Using an array to manipulate SMC100 stage position

Hi,
I am new to labVIEW. I am trying to take an image at various positions with the stage so I have to make create an array which I am not sure how to do it. For example, I want the stage to move from 10 ps - 1ps (in 1ps interval), from1 ps - 2ps (in 100 fps interval) and from 2ps - 5ps (in 1ps interval) then when I run the program it will automatically does according to the array. Any thoughts how can I do this ?
Many thanks in advance,
sdozai

You don't need to initialize the camera or the stage with each loop. You can move that outside of the loop. You also don't need the sequence structure since your data flow should make everything run in order.
There are a lot of different way to set up this VI and you're not really doing it just right, but I'm not sure exactly how you want it to operate. Since you're new to LabVIEW, you could two one of two things. You can stumble through this VI and make it work by adding Wait nodes in there, or you can go research LabVIEW programming techniques to become more familiar with the programming practices. There is a 3 hour video and a 6 hour video on the basics, I suggest you take a look.

Similar Messages

Trying to understand and use an Array

I would like to have a game where the player has three tries before the game stops or moves on to another level.
In this game an object jumps up with a mouseClick and if it doesn't hit it's target it falls where it crashes into a floor that uses hitTestObject.
This leads to a restartBtn. but I want that movieClip to remain on the stage, which has an animation that splatters. A new MovieClip is put on to the stage and the cycle starts over.
Before this stage of the game s over I want the various movieClip splatters to be visible on the stage.
I thought an Array would help me achieve this result but I'm not familiar with using them dynamically.
I'm hoping someone can give me some tips as to what might work.
I have temporarily separated this problem from the rest of the code as I'm hoping it will be clearer.
This is where I left off and when I click the button it seems to eliminate the previous movieClip and introduce the next one.
But it seems like I'm missing someting so I thought I would post it as it is probably a problem that comes up a lot in games. Thanks
import flash.display.MovieClip;
import flash.events.MouseEvent;
var movieArray:Array = new Array();
movieArray = ["Egg_A","Egg_B","Egg_C"];
movieArray[0] = new Egg;
movieArray[1] = new Egg_B;
movieArray[2] = new Egg_C;
var myMovieClip:MovieClip;
init();
function init()
          for (var i:int = 0; i < movieArray.length; i++)
                    emptyMC.addChild(movieArray[i]);
mainBtn.addEventListener(MouseEvent.CLICK,changeEgg);
function changeEgg(evt:MouseEvent):void
          for (var i:int = 0; i < movieArray.length; i++)
                    movieArray.splice(i,1);
          init();

I don't see where an array is going to make anything remain. Just having an instance created without removing it until you want it to go away is all you need.
I don't see much reason with what you are doing with that array either. First you assign a set of strings to it, then you replace those strings with instances of some Egg objects. Then you add all the eggs to the display at once in your init() function (not one at a time), or you remove them all from the array with your change Egg function... calling the init() function after emptying the array isn't going to yield much since the init() function uses the array.

How to use the array elements

Hi, i'm trying to automate a questionary using array.
// In the compositionReady for the stage
sym.actual = 0;
sym.arr = [ "Hi","Love","You" ]              // This is my question array.
sym.checkArr = function(){                  // this the function that i use to check whis question of the array i'm going to use.
          sym.Question = arr[actual];      // i want to use the value "Hi", and then increase my "actual" var and then use the value "Love"
// In my symbol timeline i use a trigger, in that trigger i use
sym.stop();
sym.quest = sym.getComposition().getStage().Question;         // I'm getting the Question value;
sym.$("Ask").html(quest );                                                         //"Ask" is an empty textfield;
sym.getComposition().getStage().actual ++;                    // Increase "actual" for the nex time.
But the code doesn't work, i think the problem is the way i use the array index.
Please help!
Thanks =)

Hi there,
chino_10 wrote:
in te timeline trigger why did you use a local variable?
It's good practice to use local variables whenever possible. The quest variable will only apply to that trigger, and it won't carry over to another trigger in the same timeline. So when using a trigger to set the HTML of a text element in the same timeline, I find it cleaner to assign a new HTML value from a local variable.
chino_10 wrote:
and if you are calling the global variable "actual" from de compositionReady handler why didn'y you call it with all the path like "sym.getComposition().getStage().actual ++;"?
I think maybe I didn't express it as clearly as I could have. When you declare sym.actual in compositionReady, you actually have declared a variable scoped to the main stage symbol - it's not a global variable. To declare a global variable (which is not always best practice), your code in compositionReady would be:
actual = 0;
This actual variable would now be accessible from any element/symbol in the composition simply by assigning a value to actual. You may see how this could quickly get messy.
So getting back to variable scope: if you declare a symbol variable using sym.varName, then any element in the same scope can call it using sym.varName. So your main timeline triggers can call it without using the full addressing of sym.getComposition().getStage().actual++. Instead, you could just use sym.actual++. Less code, and easier to read. But if you wanted to call it from another symbol (outside of the scope of the main stage), then you'd have to use the full addressing to actually address the variable, i.e., sym.getComposition().getStage().actual ++.
hth,
Joe

Error using a Array of Loaders with externals SWFs, Camera and Gyroscope ANE

Hi all. Unfortunately I have no idea where could be problem.
I am developing an AR mobile game, currently only for Android, since I can not make the Gyroscope ANE to work in IOS 6.1.3, where no data is returned from the gyroscope (this may be other future post).
The game combines camera, gyroscope and dynamically add to the stage external SWFs. Each SWFs is loaded in a "Stuff" class that extends from Loader. I control its content from the main game class. And the Stuff class that extends from Loader has another objects properties as MovieClips, another Loader, and some TextFields and Sounds.
The game dinamically creates new Stuffs, add them to an Array, and when the player "beat" the Stuff, the Stuff is removed from the stage, each Stuff object is set to null, the Stuff is spliced from the Array and finally, System.gc() is used to recover all the memory. The maximum of Stuffs in the array (and in the stage) is 3. When the level is finished, all the objects are set to null (including the gyroscope and camera), the array is spliced and set to null too, garbage collector forced and when a new level is started all the variables/objects are set again.
The problem is this: independently of the level, sometime between 32 and 37 times that I add a new Stuff to the Array and to the stage, the game stops working. A "back" button on stage does not respond, and any action in the game is ignored. In that moment, the memory (measured with System.totalMemory/1024 and displayed on screen) leaks from a 4500/6500 to 11000, the camera keeps working as the background image and the only way to exit the app is killing it from a task manager.
Another strange thing is that every time I recreate the gyroscope object the it becomes "more sensitive", like the setInterval(100) only the first time is called sets that interval, and from the second that time it seems to be lower.
Any help will be very appreciated.
Thanks in advance.

Could you please open a new bug report on this over at bugbase.adobe.com? When adding the bug, please include sample code or an application so we can quickly test this out internally. If you'd like to keep this private, feel free to email the attachment to me directly ([email protected]).
Once added, please post back with the URL so that others affected can add their comments and votes.
Thanks,
Chris

A suggestion : use "loop array list" instead of ArrayList / LinkedList

ArrayList is good at:
get / set by index : O(1)
appending : O(log(n))
remove last : O(1)
and very bad at:
add middle : O(n)
remove from middle : O(n)
LinkedList is good at:
fast remove from middle, if your iteraror already goes there : O(1)
convenient methods : addFirst, addLast, removeFirst, removeLast : O(1)
and very bad at :
get / set by index : O(n)
here I want to make a suggestion : use "loop array list" instead of the ArrayList and LinkedList.
a "loop array list" is based on array, just like ArrayList. But it has 2 member-variables : the start position, and the real size. the start position can be anywhere within array.length. an element of index "i" is stored in array[ start + i ], and when (start + i > array.length), loop to the beginning of the array; when (start + i < 0), loop to the end of the array.
this "loop array list" has all the good sides:
get / set by index : O(1)
add first / last : O(log(n))
remove first / last : O(log(n))
add / remove from middle : O(n)
(note : because we shrink the backup-array when the real size is too small, add / remove operation take O(log(n)) now.)
the only problem is : add / remove from middle. let's take a look at it.
1. the LinkedList does NOT really add/remove from middle in O(1), you has to locate the element, which is O(n).
2. O(n) is acceptable, O(n^2) is not acceptable. try this : keep removing first element from an very big ArrayList ( size>10^6 ) until it's empty.
the fact is, any list can perform batch-remove / batch-add operation in O(n) instead of O(n^2). it's easy : allocate a new list, iterate the original list, copy the element into the new list if condition is satisfied.
so, instead of "remove from middle", what we need is a new methods : removeAllByCondition( Condition condition ), and now the batch-remove operation can be done in O(n)
here is an implementation of mine. I've tested it on my computer( 512mem + 2G cpu, win2k + jdk1.5 ), it's amazing, just a little slower then ArrayList when add last, and a liitle slower then LinkedList when batch-remove. in all other cases, it's far more better then those 2 kinds of List.
// source code : List2
import java.util.AbstractList;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.NoSuchElementException;
import java.util.Set;
public final class List2<T> extends AbstractList<T> {
private static int initialArrayLength = 4;
private T[] array;
private int start;
private int size;
private void init( T[] newArray, int start_a, int size_a ) {
array = newArray;
start = start_a;
size = size_a;
@SuppressWarnings("unchecked")
private void init() {
init( (T[]) new Object[ initialArrayLength ], 0, 0 );
public List2() {
     init();
@SuppressWarnings("unchecked")
public List2( Collection<? extends T> collection ) {
     init(
          collection.toArray( (T[]) new Object[ collection.size() * 11 / 10 + 1 ] ),
          0,
          collection.size()
private List2( T[] array_a, int start_a, int size_a ) {
     init( array_a, start_a, size_a );
@SuppressWarnings("unchecked")
public static <TT> List2<TT> createV( TT... elements ) {
     TT[] array = (TT[]) new Object[ elements.length * 11 / 10 + 1 ];
     System.arraycopy( elements, 0, array, 0, elements.length );
     return new List2<TT>( array, 0, elements.length );
public static List2<Double> create( double... elements ) {
     Double[] array = new Double[ elements.length * 11 / 10 + 1 ];
     for( int i=0; i < elements.length; i++ )
          array[i] = elements;
     return new List2<Double>( array, 0, elements.length );
public static List2<Integer> create( int... elements ) {
     Integer[] array2 = new Integer[ elements.length * 11 / 10 + 1 ];
     for( int i=0; i < elements.length; i++ )
          array2[i] = elements[i];
     return new List2<Integer>( array2, 0, elements.length );
public static List2<Character> create( char... elements ) {
     Character[] array2 = new Character[ elements.length * 11 / 10 + 1 ];
     for( int i=0; i < elements.length; i++ )
          array2[i] = elements[i];
     return new List2<Character>( array2, 0, elements.length );
public static List2<Character> create( String s ) {
     return create( s.toCharArray() );
public List2<T> clone() {
     return new List2<T>( this );
// basic
public int size() {
     return size;
private int index( int index ) {
     int i = start + index;
     if( i >= array.length )
          i -= array.length;
     return i;
public T get( int d ) {
     if( d < 0 || d >= size )
          throw new IndexOutOfBoundsException();
     if( size == 0 )
          throw new NoSuchElementException();
     return array[ index( d ) ];
public T set( int index, T element ) {
     if( index < 0 || index >= size )
          throw new IndexOutOfBoundsException();
     int i = index( index );
     T oldElement = array[i];
     array[i] = element;
     return oldElement;
@SuppressWarnings("unchecked")
private void copyAndSetToNewArray( int newArrayLength ) {
     T[] newArray = (T[]) new Object[ newArrayLength ];
     for( int i=0; i<size; i++ )
          newArray[i] = array[ index( i ) ];
     init( newArray, 0, size );
public void addFirst( T element ) {
     if( size == array.length )
          copyAndSetToNewArray( size * 3 / 2 + 1 );
     int i = index( array.length - 1 );
     array[ i ] = element;
     start = i;
     size++;
public void addLast( T element ) {
     if( size == array.length )
          copyAndSetToNewArray( size * 3 / 2 + 1 );
     array[ index( size ) ] = element;
     size++;
public T removeFirst() {
     if( size == 0 )
          throw new NoSuchElementException();
     T oldElement = array[ start ];
     array[ start ] = null;
     start = index( 1 );
     size--;
     if( array.length > size * 2 + 1 )
          copyAndSetToNewArray( size * 11 / 10 + 1 );
     return oldElement;
public T removeLast() {
     if( size == 0 )
          throw new NoSuchElementException();
     int i = index( size - 1 );
     T oldElement = array[i];
     array[i] = null;
     size--;
     if( array.length > size * 2 + 1 )
          copyAndSetToNewArray( size * 11 / 10 + 1 );
     return oldElement;
@SuppressWarnings("unchecked")
public int removeAll( ListCondition<T> condition ) {
     T[] newArray = (T[]) new Object[ array.length ];
     int iNew = 0;
     for( int i=0; i < size; i++ ) {
          T element = get( i );
          if( ! condition.isConditionSatisfied( this, i, element ) )
               newArray[ iNew++ ] = element;
     int oldSize = size;
     init( newArray, 0, iNew );
     if( array.length > size * 2 + 1 )
          copyAndSetToNewArray( size * 11 / 10 + 1 );
     return size - oldSize;
// aux
public boolean equals(Object obj) {
     if( obj == this )
     return true;
     if( obj instanceof List2 ) {
          List2 that = (List2) obj;
          if( this.size != that.size )
               return false;
          for( int i=0; i < size; i++ )
               if( ! Tools.equals( this.array[ this.index(i) ], that.array[ that.index(i) ] ) )
                    return false;
          return true;
     if( obj instanceof List ) {
          List that = (List) obj;
          if( this.size != that.size() )
               return false;
          Iterator thatIter = that.iterator();
          for( int i=0; i < size; i++ )
               if( ! Tools.equals( this.array[ this.index(i) ], thatIter.next() ) )
                    return false;
          return true;
     return true;
public int hashCode() {
     int hashCode = 1;
     for( int i=0; i < size; i++ ) {
          T element = array[ index( i ) ];
     hashCode = 31*hashCode + ( element==null ? 0 : element.hashCode() );
     return hashCode;
public boolean isEmpty() {
     return size == 0;
public T getFirst() {
     return get( 0 );
public T getLast() {
     return get( size() - 1 );
public T getRandom() {
     return get( (int) (Math.random() * size) );
public int indexOf( Object element ) {
     for( int i=0; i < size; i++ )
          if( Tools.equals( array[ index( i ) ], element ) )
               return i;
     return -1;
public int lastIndexOf( Object element ) {
     for( int i=size-1; i >= 0; i-- )
          if( Tools.equals( array[ index( i ) ], element ) )
               return i;
     return -1;
public boolean contains( Object element ) {
     return indexOf( element ) != -1;
public boolean add( T element ) {
     addLast( element );
     return true;
@Deprecated
public void add( int index, T element ) {
     throw new UnsupportedOperationException();
public T remove() {
     return removeFirst();
@Deprecated
public boolean remove( Object element ) {
     throw new UnsupportedOperationException( "use removeAll( Condition ) instead" );
@Deprecated
public T remove( int index ) {
     throw new UnsupportedOperationException( "use removeAll( Condition ) instead" );
public void clear() {
     init();
public Object[] toArray() {
     Object[] result = new Object[ size ];
     for( int i=0; i < size; i++ )
     result[i] = array[ index( i ) ];
     return result;
@SuppressWarnings("unchecked")
public <TT> TT[] toArray( TT[] a ) {
if( a.length < size )
a = (TT[]) java.lang.reflect.Array.newInstance( a.getClass().getComponentType(), size );
for( int i=0; i < size; i++ )
a[i] = (TT) array[ index( i ) ];
if( a.length > size )
     a[size] = null;
return a;
@SuppressWarnings("unchecked")
public void sort() {
     Object[] a = toArray();
     Arrays.sort( a );
     for( int i=0; i < size; i++ )
          array[ i ] = (T) a[ i ];
     start = 0;
@SuppressWarnings("unchecked")
public void sortDesc() {
     Object[] a = toArray();
     Arrays.sort( a );
     for( int i=0, j=size-1; i < size; i++, j-- )
          array[ i ] = (T) a[ j ];
     start = 0;
@SuppressWarnings("unchecked")
public void sort( Comparator<T> comparator ) {
     T[] a = (T[]) toArray();
     Arrays.sort( a, comparator );
     for( int i=0; i < size; i++ )
          array[ i ] = a[ i ];
     start = 0;
@SuppressWarnings("unchecked")
public void sortDesc( Comparator<T> comparator ) {
     T[] a = (T[]) toArray();
     Arrays.sort( a, comparator );
     for( int i=0, j=size-1; i < size; i++, j-- )
          array[ i ] = a[ j ];
     start = 0;
public String toString( String delimiter ) {
     return toString( "", delimiter, "", size() );
public String toString( String prefix, String delimiter, String suffix, int max ) {
     StringBuffer stringBuffer = new StringBuffer( prefix );
     int dest = Math.min( max, size );
     for( int i=0; i < dest; i++ ) {
          stringBuffer.append( get(i) );
          if( i < dest - 1 )
               stringBuffer.append( delimiter );
     if( size > max )
          stringBuffer.append( "...(" ).append( size() - max ).append( " more)" );
     stringBuffer.append( suffix );
     return stringBuffer.toString();
// batch operation
public boolean containsAll( Collection<?> that ) {
     Set<Object> thisSet = new HashSet<Object>( this );
     for( Object element : that )
          if( ! thisSet.contains( element ) )
               return false;
     return true;
@SuppressWarnings("unchecked")
public List2<T> subList( int fromIndex, int toIndex ) {
     if( fromIndex < 0 || toIndex > size || toIndex < fromIndex )
          throw new IndexOutOfBoundsException();
     int newSize = toIndex - fromIndex;
     T[] newArray = (T[]) new Object[ newSize * 11 / 10 + 1 ];
     for( int i=fromIndex, iNew=0; i < toIndex; i++, iNew++ )
          newArray[ iNew ] = array[ index( i ) ];
     return new List2<T>( newArray, 0, newSize );
public void addV( T... that ) {
     for( T element : that )
          addLast( element );
public boolean addAll( Collection<? extends T> that ) {
     for( T element : that )
          addLast( element );
     return ! that.isEmpty();
@Deprecated
public boolean addAll( int index, Collection<? extends T> c ) {
     throw new UnsupportedOperationException();
public void removeRest( T element ) {
     int position = lastIndexOf( element );
     if( position == -1 )
          return;
     while( ! Tools.equals( element, removeLast() ) );
public void removeAllEquals( final T element ) {
     removeAll( new ListCondition<T>() { public boolean isConditionSatisfied(List2 list, int index, T currentElement) {
          return currentElement.equals( element );
public void removeAllBetween( final T from, final T to ) {
     removeAll( new ListCondition<T>() {
          @SuppressWarnings("unchecked")
          public boolean isConditionSatisfied(List2 list, int index, T element) {
               if( from != null && ((Comparable) from).compareTo( element ) > 0 )
                    return false;
               if( to != null && ((Comparable) to).compareTo( element ) <= 0 )
                    return false;
               return true;
public boolean retainAll( Collection<?> that ) {
     final Set<Object> thatSet = new HashSet<Object>( that );
     int removeCount = removeAll( new ListCondition<T>() { public boolean isConditionSatisfied(List2 list, int index, T element) {
          return ! thatSet.contains( element );
     return removeCount > 0;
public boolean removeAll( Collection<?> that ) {
     final Set<Object> thatSet = new HashSet<Object>( that );
     int removeCount = removeAll( new ListCondition<T>() { public boolean isConditionSatisfied(List2 list, int index, T element) {
          return thatSet.contains( element );
     return removeCount > 0;
// unit test
private static int maxTestCount = 1000 * 1000;
public static void unitTest() throws Exception {
     // thest thoese methods for one time
     Tools.ensureEquals( new List2(), new ArrayList() );
     Tools.ensureNotEquals( List2.create( "abcde" ), new ArrayList() );
     Tools.ensureNotEquals( List2.create( "abcde" ), List2.create( "abcdef" ) );
     final List<Double> list1 = new ArrayList<Double>();
     final List2<Double> list2 = new List2<Double>();
     Runnable[] tasks = new Runnable[] {
          // test those methods that do NOT change the list
          new Runnable() { public void run() {
               Tools.ensureEquals( new List2<Double>( list1 ), list1 );
               Tools.ensureEquals( List2.createV( list1.toArray() ), list1 );
               Tools.ensureEquals( List2.createV( list1.toArray( new Double[0] ) ), list1 );
               double[] doubles = new double[ list1.size() ];
               int i = 0;
               for( double d : list1 )
                    doubles[i++] = d;
               Tools.ensureEquals( List2.create( doubles ), list1 );
               Tools.ensure( list1.isEmpty() == list2.isEmpty() );
               Arrays.equals( list1.toArray(), list2.toArray() );
               Tools.ensureEquals( list1, list2.clone() );
               Double notExistElement = -2.0;
               Tools.ensure( list1.indexOf( notExistElement ) == -1 );
               Tools.ensure( list1.lastIndexOf( notExistElement ) == -1 );
               Tools.ensure( list1.contains( notExistElement ) == false );
               Tools.ensureEquals( list1.toString(), list2.toString() );
               Tools.ensureEquals( list1.toString(), list2.toString() );
               Tools.ensureEquals( list1.hashCode(), list2.hashCode() );
               if( list1.isEmpty() )
                    return;
               Tools.ensure( list1.get(0).equals( list2.getFirst() ) );
               Tools.ensure( list1.get(list1.size()-1).equals( list2.getLast() ) );
               Double existRandomElement = list2.getRandom();
               Tools.ensure( list1.contains( existRandomElement ) );
               Tools.ensure( list2.contains( existRandomElement ) );
               Tools.ensure( list1.indexOf( existRandomElement ) == list2.indexOf( existRandomElement ) );
               Tools.ensure( list1.indexOf( existRandomElement ) == list2.indexOf( existRandomElement ) );
               int from = (int) (Math.random() * list1.size());
               int to = (int) (Math.random() * (list1.size()+1));
               if( from > to ) {
                    int t = from;
                    from = to;
                    to = t;
               Tools.ensureEquals( list1.subList( from, to ), list2.subList( from, to ) );
          // test those methods that change the list
          new Runnable() { public void run() {
               if( list1.isEmpty() )
                    return;
               int i = (int) (Math.random() * list1.size());
               double d = Math.random();
               list1.set( i, d );
               list2.set( i, d );
          new Runnable() { public void run() {
               if( list1.isEmpty() )
                    return;
               int i = (int) (Math.random() * list1.size());
               Tools.ensure( list1.get( i ).equals( list2.get( i ) ) );
          new Runnable() { public void run() {
               double d = Math.random();
               list1.add( 0, d );
               list2.addFirst( d );
          new Runnable() { public void run() {
               double d = Math.random();
               list1.add( d );
               list2.addLast( d );
          new Runnable() { public void run() {
               double d = Math.random();
               list1.add( d );
               list2.addLast( d );
          new Runnable() { public void run() {
               if( list1.isEmpty() )
                    return;
               Tools.ensure( list1.remove( 0 ).equals( list2.removeFirst() ) );
          new Runnable() { public void run() {
               if( list1.isEmpty() )
                    return;
               Tools.ensure( list1.remove( list1.size() - 1 ).equals( list2.removeLast() ) );
          new Runnable() { public void run() {
               if( list1.isEmpty() )
                    return;
               int i = 0;
               for( Iterator<Double> iter=list1.iterator(); iter.hasNext(); i++ ) {
                    iter.next();
                    if( i % 3 == 0 )
                         iter.remove();
               list2.removeAll( new ListCondition<Double>() { public boolean isConditionSatisfied(List2 list, int index, Double element) {
                    return index % 3 == 0;
          new Runnable() { public void run() {
               double d = Math.random();
               list1.add( d );
               list2.add( d );
          new Runnable() { public void run() {
               if( list1.isEmpty() )
                    return;
               Tools.ensure( list1.remove(0).equals( list2.remove() ) );
          new Runnable() { public void run() {
               if( list1.isEmpty() )
                    return;
               int r = (int) (Math.random() * list1.size());
               Double element = list1.get( r );
               int index = list1.lastIndexOf( element );
               for( int i=list1.size()-1; i>=index; i-- )
                    list1.remove( i );
               list2.removeRest( element );
          new Runnable() { public void run() {
               list2.removeRest( Math.random() - 2 );
          new Runnable() { public void run() {
               list1.clear();
               list2.clear();
          new Runnable() { public void run() {
               Collections.sort( list1 );
               list2.sort();
          new Runnable() { public void run() {
               Collections.sort( list1 );
               Collections.reverse( list1 );
               list2.sortDesc();
          new Runnable() { public void run() {
               Comparator<Double> comparator = new Comparator<Double>() { public int compare(Double o1, Double o2) {
                    return o1.toString().substring(2).compareTo( o2.toString().substring(2) );
               Collections.sort( list1, comparator );
               list2.sort( comparator );
          new Runnable() { public void run() {
               Comparator<Double> comparator = new Comparator<Double>() { public int compare(Double o1, Double o2) {
                    return o1.toString().substring(2).compareTo( o2.toString().substring(2) );
               Collections.sort( list1, comparator );
               Collections.reverse( list1 );
               list2.sortDesc( comparator );
          new Runnable() { public void run() {
               Double notExistElement = -2.0;
               list2.removeAllEquals( notExistElement );
               Tools.ensureEquals( list1, list2 );
               list2.removeAllBetween( 0.5, 0.6 );
               for( Iterator<Double> iter=list1.iterator(); iter.hasNext(); ) {
                    double d = iter.next();
                    if( d >= 0.5 && d < 0.6 )
                         iter.remove();
               Tools.ensureEquals( list1, list2 );
     System.out.print( "test List2 " );
     for( int i=0; i < maxTestCount; i++ ) {
          tasks[ (int) (Math.random() * tasks.length) ].run();
          Tools.ensureEquals( list1, list2 );
          if( i % (maxTestCount/10) == 0 )
               System.out.print( "." );
     System.out.println( " ok" );
// source code : ListCondition
public interface ListCondition<T> {
boolean isConditionSatisfied( List2 list, int index, T element );

Hi,
I have the following statement:
private List list = new ArrayList();
why not use private ArrayList list = new
ArrayList()?
I know ArrayList implements List, so list has a wide
scope, right? What's the benefit?
Thanks,
JieBy using the interface you are not tied to a specific implementation.
Later, you may determine that using a LinkedList is more efficient to your specific code and then all you need to do is change the statement to:
private List list = new LinkedList();As long as you are not casting the list reference to ArrayList (or something along those lines) you would not need to change anything else.

How do I use an array variable in the assignment target?

Hi,
I am creating a BPEL process in which I have to use an array variable. The array variable needs to be initialized based on some condition.
The issue is I cannot find a way to set the value of the array variable. There are ways to GET the value of an array variable indexing into it.
But how do I set the value by using the Array variable in the <to> tag?
Any help is appreciated. I am using BPEL 10.1.2.0.2.
Thanks.

You can declare a variable of type integer which will server as your index. Figure out based on some condition in your process which index of array to update. Assign to your integer variable you created.
And have Assign copy operation like this -
<copy>
<from variable="Var_Output_FetchDueDate"
part="OutputParameters"
query="/ns18:OutputParameters/ns18:DUEDATE"/>
<to variable="outputVariable" part="payload"
query="/client:GetCustomerAccountInformationProcessResponse/client:customer/client:accounts/client:account[$Var_Counter]/client:dueDate"/>
</copy>
I have been using this in my processes.

How can I use my array in another method.... Or better yet, what's wrong?

I guess I'll show you what I am trying to do rather and then explain it
public class arraycalc
int[] dog;
public void arraycalc()
dog = new int[2];
public void setSize(int size)
dog[1] = size;
public int getSize()
return dog[1];
This gives me a null pointer exception...
How can I use my array from other methods?

You have to make the array static. :)
Although I must admit, this is rather bad usage. What you want to do is use an object constructor to make this class an object type, and then create the array in your main class using this type, and then call the methods from this class to modify your array. Creating the array inside the other method leads to a whole bunch of other stuff that's ... well, bad. :)
Another thing: Because you're creating your array inside this class and you want to call your array from another class, you need to make the array static; to make it static, you must make your methods static. And according to my most ingenious computer science teacher, STATIC METHODS SUCK. :D
So, if you want to stick with your layout, it would look like:
public class arraycalc
     static int[] dog;
     public static void arraycalc()
          dog = new int[2];
     public static void setSize(int size)
          dog[1] = size;
     public static int getSize()
          return dog[1];
}But I must warn you, that is absolutely horrible code, and you shouldn't use it. In fact, I don't even know why I posted it.
You should definitely read up on OOP, as this problem would be better solved by creating a new object type.

How to change the frequency of pulse train on the fly using an array of values?

Hi all!
First I want to thank U for the great job you are doing for this forum.
Iam still busy trying to control a stepper motor, by sending pulses from my E-series 6024 to a compumotor s6- stepper Driver. I've managed to get it working. I desperately need to control the motor using the values from an array. I believe we can use two approaches for that:
1st - I can get an array of the "numbers of pulses". Each element must run for 10 milliseconds. Using that we can calculate the array of frequencies to send the number of pulses within 10 milliseconds for each specific element. Could we use the arrays of "number of pulses" and frequencies in a "finite pulse train " and up
date with each element every 10 millisecond?
2nd - Or Could we use of the frequency array in a "continuous pulse train vi" and update it every 10 milliseconds?
Please note that I must use the values as they are.
Can someone please built a good example for me? Your help will be appreciated.
Regards
Chris
Attachments:
number_of_steps.txt ‏17 KB
frequency.txt ‏15 KB

Tiano,
I will try to better explain the paragraph on LabVIEW. The original paragraph reads ...
"While in a loop for continuous pulse train generation, make two calls to Counter Set Attribute.vi to set the values for "pulse spec 1" (constant 14) and "pulse spec 2" (constant 15). Following these calls you would make a call to Counter Control.vi with the control code set to "switch cycle" (constant 7). The attached LabVIEW programs demonstrate this flow."
You can make two calls to Counter Set Attribute or you can make a call to Set Pulse Specs which, if you open this VI, you will see that it is just making two calls to Counter Set Attribute. What you are doing with the Counter Set Attribute VIs is setting two registers called "pulse s
pec 1" and "pulse spec 2". These two registers are used to configure the frequency and duty cycle of your output frequency.
The example program which is attached to this Knowledge Base demonstrates how to change the frequency of a continuous generation on the fly. Why continuous? Because changing the frequency of a finite train would be easy. When the train completes it's finite generation you would just change the frequency and run a finite train again. You would not care about the time delay due to reconfiguration of the counter.
If you would like to change the frequency of the pulse train using a knob, this functionality will have to be added in the while loop. The while loop will be continuously checking for the new value of the knob and using the knob value to set the pulse specs.
LabVIEW is a language, and as with learning all new languages (spoken or programatic) there is a lot of learning to be accomplished. The great thing is that LabVIEW is much easier than mo
st languages and the learning curve should be much smaller. Don't fret, you'll be an expert before you know it. Especially since you're tackling a challenging first project.
Regards,
Justin Britten

Using Variables/Arrays from one class in another

Hello all,
First, to explain what I am attempting to create, is a program that will accept input of employee names and hours worked into an array. The first class will accept a command line argument when invoked. If the argument is correct, it will call another class that will gather information from the user via an input box. After all names and hours have been input for employees, this class will calculate the salary based upon the first letter of each employee name and print the total hours, salary, etc. for each employee.
What I need to do now is to split the second class into two: one that will gather the data and another that will calculate and print the data. Yes, this is an assignment. However, I am trying to learn and I have gotten this far, but I am stuck on how to get a class to be able to use an array/variables from another class.
I realize the below code isn't exactly cleaned up...yet.
Code for AverageSalaryGather class:
import javax.swing.JOptionPane; // uses class JOptionPane
import java.lang.reflect.Array;
import java.math.*;
public class AverageSalaryGather {
     public static void gatherData() {
          char[] alphaArray = {'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','x','y','z'};
          String[][] empInfoArray = new String[100][4];
          String[] empNameArray = new String[100];
          String finalOutput = "Name - Rate - Hours - Total Pay\n";
          String averageHoursOutput = "Average Hours Worked:\n";
          String averageSalaryOutput = "Average Hourly Salary:\n";
          String averageGroupSalaryOutput = "Average Group Salary:\n";
                    String[] rateArray = new String[26];
                    char empNameChar = 'a';
          int empRate = 0;
          int payRate = 0;
                    for (int i = 0; i < 26; i++) {
               payRate = i + 5;
               rateArray[i] = Integer.toString(payRate);
                    int countJoo = 0;
          while (true) {
               String namePrompt = "Please enter the employee name: ";
               String empName = JOptionPane.showInputDialog(namePrompt);
                              if (empName == null | empName.equals("")) {
                    break;
               else {
                    empInfoArray[countJoo][0] = empName;
                    for (int i = 0; i < alphaArray.length; i++) {
                         empNameChar = empName.toLowerCase().charAt(0);
                                                  if (alphaArray[i] == empNameChar) {
                              empInfoArray[countJoo][1] = rateArray;
                              break;
                    countJoo++;
          // DecimalFormat dollarFormat = new DecimalFormat("$#0.00");
          for (int i = 0; i < empInfoArray.length; i++) {
               if (!(empInfoArray[i][0] == null)) {
                    String hourPrompt = "Please enter hours for " + empInfoArray[i][0] + ": ";
                    String empHours = JOptionPane.showInputDialog(hourPrompt);
                    int test = 0;
                    empInfoArray[i][2] = empHours;
                    // convert type String to double
                    //double tmpPayRate = Double.parseDouble(empInfoArray[i][1]);
                    //double tmpHours = Double.parseDouble(empInfoArray[i][2]);
                    //double tmpTotalPay = tmpPayRate * tmpHours;
                    // create via a string in empInfoArray
                         BigDecimal bdRate = new BigDecimal(empInfoArray[i][1]);
                         BigDecimal bdHours = new BigDecimal(empInfoArray[i][2]);
                         BigDecimal bdTotal = bdRate.multiply(bdHours);
                         bdTotal = bdTotal.setScale(2, RoundingMode.HALF_UP);
                         String strTotal = bdTotal.toString();
                         empInfoArray[i][3] = strTotal;
                    //String strTotalPay = Double.toString(tmpTotalPay);
                    //empInfoArray[i][3] = dollarFormat.format(tmpTotalPay);
                    else {
                         break;
          AverageSalaryCalcAndPrint averageSalaryCalcAndPrint = new AverageSalaryCalcAndPrint();
          averageSalaryCalcAndprint.calcAndPrint();
Code for AverageSalaryCalcAndPrint class (upon compiling, there are more than a few complie errors, and that is due to me cutting/pasting the code from the other class into the new class and the compiler does not know how to access the array/variables from the gatherData class):
import javax.swing.JOptionPane; // uses class JOptionPane
import java.lang.reflect.Array;
import java.math.*;
public class AverageSalaryCalcAndPrint
     public static void calcAndPrint() {
          AverageSalaryGather averageSalaryGather = new AverageSalaryGather();
          double totalHours = 0;
          double averageHours = 0;
          double averageSalary = 0;
          double totalSalary = 0;
          double averageGroupSalary = 0;
          double totalGroupSalary = 0;
          int countOfArray = 0;
          for (int i = 0; i < empInfoArray.length; i++) {
               if (!(empInfoArray[0] == null)) {
                    totalSalary = totalSalary + Double.parseDouble(empInfoArray[i][1]);
                    totalHours = totalHours + Double.parseDouble(empInfoArray[i][2]);
                    totalGroupSalary = totalGroupSalary + Double.parseDouble(empInfoArray[i][3]);
                    countOfArray = i;
          averageHours = totalHours / (countOfArray + 1);
          averageSalary = totalSalary / (countOfArray + 1);
          averageGroupSalary = totalGroupSalary / (countOfArray + 1);
          String strAverageHourlySalary = Double.toString(averageSalary);
          String strAverageHours = Double.toString(averageHours);
          String strAverageGroupSalary = Double.toString(averageGroupSalary);
          for (int i = 0; i < empInfoArray.length; i++) {
               if (!(empInfoArray[i][0] == null)) {
                    finalOutput = finalOutput + empInfoArray[i][0] + " - " + "$" + empInfoArray[i][1] + "/hr" + " - " + empInfoArray[i][2] + " - " + "$" + empInfoArray[i][3] + "\n";
          averageHoursOutput = averageHoursOutput + strAverageHours + "\n";
          averageSalaryOutput = averageSalaryOutput + strAverageHourlySalary + "\n";
          averageGroupSalaryOutput = averageGroupSalaryOutput + strAverageGroupSalary + "\n";
          JOptionPane.showMessageDialog(null, finalOutput + averageHoursOutput + averageSalaryOutput + averageGroupSalaryOutput, "Totals", JOptionPane.PLAIN_MESSAGE );

Call the other class's methods. (In general, you
shouldn't even try to access fields from the other
class.) Also you should be looking at an
instance of the other class, and not the class
itself, generally.Would I not call the other classes method's by someting similar as below?:
AverageSalaryCalcAndPrint averageSalaryCalcAndPrint = new AverageSalaryCalcAndPrint();
          averageSalaryCalcAndprint.calcAndPrint(); Well... don't break down classes based on broad steps
of the program. Break them down by the information
being managed. I'm not expressing this well...Could you give an example of this? I'm not sure I'm following well.
Anyway, you want one or more objects that represent
the data, and operations on that data. Those
operations include calculations on the data. Other
classes might represent the user interface, and
different output types (say, a file versus the
console).Yes, the requirements is to have a separate class to gather the data, and then another class to calculate and print the data. Is this what you mean in the above?

How to create and use mutable array of UInt8

Hello!
If I get it right, UInt8 *buffer, buffer - is a pointer to a start of array?
Then how to create and use mutable array of UInt8 pointers?
The main target is a creation of the module that will store some byte array requests and will send all of them at the propriate moment.

I try
- (void) scheduleRequest:(UInt8 *)request {
if (!scheduledRequests) scheduledRequests = [[NSMutableArray array] retain];
[scheduledRequests addObject:request];
But get warning:"passing argument 1 of 'addObject:' from incompatible pointer type"

How to use an array in a SQL Query

Hi
I need to use an array of numbers such as a VARRAY or Associated Index Array so that I can do the following SQL:
select *
from *
where array is null or id is in array
So that if the array is empty it will return all the records, and if the array is not empty then it will return only the rows associated with the ids in the array.
Is this possible?
Regards,
Néstor Boscán

Actually, solution I posted returns all rows when VARRAY is empty, not when it is null. To return all rows when VARRAY is null, use:
SQL> select ename
2    from emp
3    where deptno in (select * from table(cast(sys.OdciNumberList(10,30) as sys.OdciNumberList)))
4       or sys.OdciNumberList(10,30) is null
5 /
ENAME
ALLEN
WARD
MARTIN
BLAKE
CLARK
KING
TURNER
JAMES
MILLER
9 rows selected.
SQL> select ename
2    from emp
3    where deptno in (select * from table(cast(null as sys.OdciNumberList)))
4       or null is null
5 /
ENAME
SMITH
ALLEN
WARD
JONES
MARTIN
BLAKE
CLARK
SCOTT
KING
TURNER
ADAMS
ENAME
JAMES
FORD
MILLER
14 rows selected.
SQL> SY.

Error in the pl/sql block using associative arrays

Hi
I tried the following block of code using associative arrays.
DECLARE
   TYPE NumTab IS TABLE OF NUMBER INDEX BY BINARY_INTEGER;
   CURSOR c1 IS SELECT empno FROM emp;
   empnos NumTab;
   rows   NATURAL := 10;
BEGIN
   OPEN c1;
   FOR i in empnos.first..empnos.last LOOP
      /* The following statement fetches 10 rows (or less). */
      FETCH c1 BULK COLLECT INTO empnos LIMIT rows;
      EXIT WHEN c1%NOTFOUND;
      DBMS_OUTPUT.PUT_LINE ( empnos.next(i));
   END LOOP;
   CLOSE c1;
END;and the error is
DECLARE
ERROR at line 1:
ORA-06502: PL/SQL: numeric or value error
ORA-06512: at line 8could you please let me know where i'm wrong
and please guide me where we use these associative arrays.
Thanks

Something like this. Do minor modification in your code.
DECLARE
   TYPE NumTab IS TABLE OF NUMBER INDEX BY BINARY_INTEGER;
   CURSOR c1 IS SELECT empno FROM emp;
   empnos NumTab;
   rows   NATURAL := 5;
BEGIN
   OPEN c1;
   LOOP
    /* The following statement fetches 5 rows (or less). */
      FETCH c1 BULK COLLECT INTO empnos LIMIT rows;
      EXIT WHEN c1%NOTFOUND;
      DBMS_OUTPUT.PUT_LINE ( empnos.count);
   END LOOP;
   CLOSE c1;
END;
/

Error when using byte array in web service model interface

Hello everybody,
I'm using a web service model in my web dynpro application. The web service requires a byte array as import parameter.
When starting the web dynpro application the following error occurs:
com.sap.tc.webdynpro.services.exceptions.WDTypeNotFoundException: type java:byte not found
at com.sap.tc.webdynpro.services.datatypes.core.DataTypeBroker.getDataType(DataTypeBroker.java:216)
I'm using byte arrays several times in my application --> no problem. So why does the error say "byte not found" when using the web service?
Thanks for your help!
regards
Christian

Hi,
maybe this is the problem. The type is byte and not binary.
But I have the same problem as mentioned in the other thread: I can't change the type.
The type in the WSDL of my web service is "base64binary". Is there maybe a possibility to import a jar-file for this type?
Christian

Using Parameterized Arrays in Stored Procedure

I tried following code to pass array value to stored procedure but its giving error, as I am new to this procedure, please advise what am I missing ?
Best Regards,
Luqman
My code is as below.
CREATE TYPE num_array AS table of number;
create or replace procedure give_me_an_array
( p_array in num_array )
as
begin
for i in 1 .. p_array.count
loop
dbms_output.put_line( p_array(i) );
end loop;
end give_me_an_array;
declare
mdata num_array;
begin
mdata(1) := 1234;
mdata(2) := 10;
give_me_an_array(mdata);
end;

Hi Satya,
Now I got it, thanks,
Can you please advise, if I use the same stored procedure for EMP Table and use my array values to retrieve the selected EMPNo
I tried following but I could not succeed.
When I compile the stored procedure, error occurs:
"inconsistent datatypes: expected NUMBER got NUM_ARRAY"
for example:
CREATE TYPE NUM_ARRAY AS TABLE OF NUMBER;
Create or Replace Package TB_Data
Is Type CV_Type Is REF CURSOR;
END TB_DATA;
Create or Replace Stored Procedure give_me_an_array
(CV IN OUT TB_DATA.CV_TYPE,
MEmpNo In Num_Array)
Is
Begin
Open CV for
Select * from EMP
Where Empno in MEmpNo;
End myProc;
declare
mdata num_array:=num_array(7839,7844);
begin
give_me_an_array(mdata);
end;
Best Regards,
Luqman

Using an array in another class to set text of a button

I am trying to use an array from one class in another to set the text of a button.
This is the code in the class where i have made the array.
public class EnterHomeTeam
     public int NumberOfPlayers = 11;
     public String[] PlayerName = new String [NumberOfPlayers];
private void button1_Click (Object sender, System.EventArgs e)
          PlayerName [0] = this.HGoalKeeper.toString();
          PlayerName [1] = this.HDef1.toString();
          PlayerName [2] = this.HDef2.toString();
          PlayerName [3] = this.HDef3.toString();
          PlayerName [4] = this.HDef4.toString();
          PlayerName [5] = this.HMid1.toString();
          PlayerName [6] = this.HMid2.toString();
          PlayerName [7] = this.HMid3.toString();
          PlayerName [8] = this.HMid4.toString();
          PlayerName [9] = this.HAtt1.toString();
          PlayerName [10] = this.HAtt2.toString();
          Players IM = new Players();
          this.Hide();
          IM.Show();
}Then in the class where i want to use the variables (ie. PlayerName[0]) I have got
public class Players
EnterHomeTeam HT = new EnterHomeTeam();
//and included in the button code
this.button1.set_Text(HT.PlayerName[0]);I hope i have explained this well enough and hope someone can help me solve this problem! Im not a very competent programmer so i apologise if I havent explained this well enough!
Adam

.NET automatically generates quite a bit of code.... this is button1:
private void InitializeComponent()
          this.button1 = new System.Windows.Forms.Button();
// button1
          this.button1.set_BackColor(System.Drawing.Color.get_LightBlue());
          this.button1.set_Location(new System.Drawing.Point(88, 32));
          this.button1.set_Name("button1");
          this.button1.set_Size(new System.Drawing.Size(72, 56));
          this.button1.set_TabIndex(0);
          this.button1.set_Text(HT.PlayerName[0]);
          this.button1.add_Click( new System.EventHandler(this.button1_Click) );
this.get_Controls().Add(this.button1);
     private void button1_Click (Object sender, System.EventArgs e)
          System.out.print(HT.PlayerName[0]);
          GKAction GK = new GKAction();
          this.Hide();
          GK.Show();
     }Hope that helps - im pretty sure that's all the button1 code

Using an array to manipulate SMC100 stage position

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