How can i improve this 2min countdown timer?
Hello
I'm trying to see if anyone has any ideas on how to improve this simple 2 minute countdown timer. All suggestions are welcome!
Thanks in advance!
-noviceLabVIEWuser
Solved!
Go to Solution.
Attachments:
2min Countdown Timer.vi 38 KB
As an alternative, I used a case structure to eliminate some calculations for Sample Time while Air Time is counting down and vice versa. I don't know if this is necessarily better. Your original code was simple and it worked fine.
False case showing: True case showing:
- tbob
Inventor of the WORM Global
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Hmm, that's some sort of MIDI Arpeggiator setup in your environment. Strange that you don't know it, this has to be custom-installed, it is not part of the standard setup.
You can do two things about it:
1.unlock your current screenset (shift-L), then close the (Bass Driver) window, then relock the screenset (shift-L). Next time you open up this project you won't see the Bass Driver, but it is still in the project.
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Hi guys i am beginner , just wanted to know some info , how can i improve this query ..
select *
from tableA A, viewB B,
where A.key = B.key
and a.criteria1 = '111'
and a.criteria2 = some_funtion(a.key)
one more thing should function should be on left side of equal sign.
will a join make it better or something else is needed more than that .952936 wrote:
Hi guys i am beginner , just wanted to know some info , how can i improve this query ..
select *
from tableA A, viewB B,
where A.key = B.key
and a.criteria1 = '111'
and a.criteria2 = some_funtion(a.key)
one more thing should function should be on left side of equal sign.
will a join make it better or something else is needed more than that .If you are a beginner try to learn the ANSI Syntax. This will help you a lot to write better queries.
Your select would look like this in ANSI.
select *
from tableA A
JOIN viewB B ON A.key = B.key
WHERE a.criteria1 = '111'
and a.criteria2 = some_function(a.key);The good thing here is that this separates the typical joining part of the select from the typical filter criteria.
The other syntax very often let you forget one join. Just because there are so many tables and so many filters, that you just don't notice correctly anymore what was join and what not.
If you notice that the number of column is not what you expect, you can easiely modify the query and compare the results.
example A
Remove View B from the query (temporarily comment it out).
select *
from tableA A
--JOIN viewB B ON A.key = B.key
WHERE a.criteria1 = '111'
and a.criteria2 = some_funtion(a.key)
example B
You notice, that values from A are missing. Maybe because there is no matching key in ViewB? Then change the join to an outer join.
select *
from tableA A
LEFT OUTER JOIN viewB B ON A.key = B.key
WHERE a.criteria1 = '111'
and a.criteria2 = some_funtion(a.key)(The outer keyword is optional, left join would be enough). -
It's basically to add lots of tasks that should execute after a certain amount of time and execute them efficiently. How can I improve it? I've already thought of making the Events loop able.
package eventmanager;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
* Handles the processing of timed event
* very efficiently.
* @author Colby
public class EventEngine {
public static void main(String[] args) {
Event e1 = new Event(1000) {
@Override
public void execute() {
System.out.println("Executed 1000ms");
Event e2 = new Event(2000) {
@Override
public void execute() {
System.out.println("Executed 2000ms");
EventEngine engine = new EventEngine();
engine.add(e1);
engine.add(e2);
public static abstract class Event implements Comparable {
public Event(long timeUntilExecute) {
this.timeCreated = System.currentTimeMillis();
this.timeUntilExecution = timeUntilExecute;
@Override
public int compareTo(Object o) {
if (!(o instanceof Event)) {
throw new IllegalArgumentException("Input Object must inherit from eventmanager.Event");
Event e = (Event) o;
long thisLeft = getTimeUntilExecution();
long otherLeft = e.getTimeUntilExecution();
return thisLeft < otherLeft ? -1 : otherLeft < thisLeft ? 1 : 0;
public abstract void execute();
public boolean timeToExecute() {
return getTimeUntilExecution() < 1;
public long getTimeCreated() {
return timeCreated;
public long getTimeUntilExecution() {
return timeUntilExecution - (System.currentTimeMillis() - timeCreated);
private long timeCreated;
private long timeUntilExecution;
public EventEngine() {
this.events = new LinkedList<Event>();
Runnable task = new Runnable() {
@Override
public void run() {
while (true) {
try {
cycle();
} catch (InterruptedException e) {
e.printStackTrace();
Thread t = new Thread(task);
t.setName("Event Manager");
t.start();
private void cycle() throws InterruptedException {
synchronized (this) {
if (events.isEmpty()) {
wait();
} else {
Collections.sort(events);
Event e = events.get(0);
if (e.timeToExecute()) {
e.execute();
events.remove(0);
} else {
wait(e.getTimeUntilExecution());
public void add(Event e) {
synchronized (this) {
events.add(e);
notify();
private List<Event> events;
}Edited by: Jadz_Core on Jan 21, 2010 4:05 PMJadz_Core wrote:
Melanie_Green wrote:
Jadz_Core wrote:
Nobody has any criticism :O
return thisLeft < otherLeft ? -1 : otherLeft < thisLeft ? 1 : 0;MelBecause it's against conventions or can it be done better?The code is barely readable.
if(thisLeft < otherLeft) {
return -1;
else if(otherLeft < thisLeft) {
return 1;
else {
return 0;
}Is slightly more readable yet not quite adequate. In fact this looks something similar to hmmmm....
Long thisLeft = getTimeUntilExecution();
Long otherLeft = e.getTimeUntilExecution();
return thisLeft.compareTo(otherLeft);Ahhhhhhhhh
Mel -
DATA: t_bkpf TYPE bkpf.
DATA: t_bseg type bseg_t.
DATA: wa_bseg like line of t_bseg.
select * from bkpf into t_bkpf where document type ='KZ' and bldat in s_bldat.
select single * from bseg into wa_bseg where belnr = t_bkpf-belnr.
append wa_bseg to t_bseg.
endselect.
loop at t_bseg into wa_bseg.
at new belnr.
if wa_bseg-koart EQ 'K'.
// pick vendor wrbtr
else
// pick other line item's wrbtr
endif.
endat.
endloop.
i am guessing my select statements arnt efficient performance wise, secondly in the loop when i use 'at new belnr' it aint showing my any values whereas i get all the vendors(KOART EQ 'K') when i dont use 'at new belnr' .
why is this so and how can i make the code efficient ?
Thanks..
ShehryarHi,
1.Dont read all the fields from the table unless it is required in your program.
This will tremendously improve your performance.
2.Make use of the key fields of the table wherever possible
In your scenario you could use the fields BUKRS,BELNR,GJAHR of the table BKPF in the WHERE Clause rather than
other fields.This will improve your performance a lot..
3.As BSEG is a cluster table it will cause performance problem in most cases.So try to read
the required fields from it rather than reading all the fields.Again Make use of the key fields in the WHERE Clause
here too to improve the performance..
4.Remove SELECT..ENDSELECT and replace it with FOR ALL ENTRIES to improve the performance.
Cheers,
Abdul Hakim
Mark all useful answers.. -
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How can i improve this function?i need your help....
Hi guys,
i'm a pratical question for you.
I've developed a jas application that reads a txt file and convert it
into an array of byte,fro putting it into a blob field of a db mysql.
With big file i go in heap size memory!
I want to improve my function that makes it,but i'm a bit
inexpert...can you help me?
I have a file so made...
Each line has the same number of value,but i know this number only when
i read the file
string1 string2 string3................
stringx double double......(ever double)
stringy double double......(ever double)
and other lines equals to them from the second.
Only the first line has only strings.
I have read this file using a string array to read the first line and
an arraylist of "Riga" object to read the others lines.....i've used a
vector to store partial data from lines reading and at the end i've
created an array of byte in which i copy the vector.
Can you help me improving my code?
The file has about 50000 rows......so i go in heap memory size...
i know my code isn't too optimized.....can you help me?Please,i'm a
newbie,help me with code if possible...
When i encode the objects i've created into an array of byte i use a
whitespace to separe different value and a ; to separe different lines.
I've done it because in a second moment i've to read the array of byte.
Thanks...this is my code
public class MyBean {
private UploadedFile myFile;
private ArrayList rows = new ArrayList();
private List lines = new ArrayList();
public MyBean(){
public List getLines(){
return lines;
public void setLines(List lines){
this.lines=lines;
public boolean insRighe(Riga nuovo){
return rows.add(nuovo);
public UploadedFile getMyFile() {
return myFile;
public void setMyFile(UploadedFile myFile) {
this.myFile = myFile;
public ArrayList getRows() {
return rows;
public void setRows(ArrayList rows) {
this.rows = rows;
public String carica() throws IOException {
Riga r;
Double val[];
Head h;
int col=0;
int row=0;
byte middlerow=' ';
byte endrow=';';
byte[] data=null;
Vector temp=new Vector();
int numberOfNumericColumns=0;
String geneid=null;
String g=null;
String[]intest=null;
BufferedReader br = new BufferedReader(new
InputStreamReader(myFile.getInputStream()));
String line = null;
while ((line = br.readLine()) != null) {
line = line.replace (',', '.');
StringTokenizer st = new StringTokenizer(line);
numberOfNumericColumns = (st.countTokens()-1);
col=(numberOfNumericColumns+1);
//se siamo nella prima riga(contatore segna 0)
if(row==0){
intest=new String[col];
int j=0;
while(st.hasMoreTokens()){
intest[j]=(st.nextToken().trim());
j++;
h=new Head(intest);//crei l'oggetto head
String []qa=h.getHvalues();
String asd="";
for(int i=0;i<=qa.length-1;i++){
asd=asd.concat(qa[i]+" ");
System.out.println("head "+asd);//stampo contenuto
dell' head
row=1;
}//fine if
else
Double[] values=new Double[numberOfNumericColumns];
int z=0;
geneid=st.nextToken();
while (st.hasMoreTokens()) {
String app=st.nextToken();
values[z]=Double.valueOf(app);
z++;
r=new Riga(geneid,values); //crei l'oggetto riga
System.out.println("riga");
System.out.println(r.getgeneid());
values=r.getvalues();
for(int e=0;e<values.length;e++){
System.out.println(values[e]);
insRighe(r); //aggiungi
row++;
int i = 0;
while (i < intest.length) {
byte[] bytesnew = intest.getBytes();
// temp.addAll(bytesnew);
// memorizza in byte un elemento del vettore alla volta
for (byte b : bytesnew)
temp.add(new Byte(b)); // provare Byte
// temp.addElement(intest[i].getBytes());
temp.addElement(Byte.valueOf(middlerow));
i++;
temp.addElement(Byte.valueOf(endrow));
System.out.println("Intestazione convertita in byte");
for (int l = 0; l < rows.size(); l++) {
r = (Riga) rows.get(l);
g = r.getgeneid();
// temp.addElement(g.getBytes());
byte[] byte2 = g.getBytes();
for (byte c : byte2)
temp.add(new Byte(c));
temp.addElement(Byte.valueOf(middlerow));
val = r.getvalues();
byte[] tempByte1;
for (int e = 0; e <= val.length - 1; e++) {
// Returns a string representation of the double argument.
tempByte1 = Double.toString(val[e]).getBytes();
for (int j = 0; j < tempByte1.length; j++) {
temp.addElement(Byte.valueOf(tempByte1[j]));
temp.addElement(Byte.valueOf(middlerow));
temp.addElement(Byte.valueOf(endrow));
data = new byte[temp.size()];
for (int t = 0; t < temp.size(); t++) {
data[t] = (((Byte) temp.elementAt(t)).byteValue());
return data;
public class Riga{
private String geneid=null;
private Double[] values=null;
public Riga(String idGene,Double[] x ) {
this.geneid=idGene;
this.values=x;
public String getgeneid(){
return this.geneid;
public void setgeneid(String idGene){
this.geneid=idGene;
public Double[] getvalues(){
return this.values;
public void setvalues(Double[] x){
this.values=x;
Message was edited by:
giubatMaybe I didn't understand you, but why are you putting a file with 50000 rows as one single BLOB into a DB? Don't you think it's time for a new table?
-
How can i improve this design?
hello,
i'm creating a website for consulting company which specialises in measuring greenhouse gas emissions.
i have been trying to come up with a good, simple, basic, professional design for my website.
this is what I have come up with so far - it is an internal page (the home page will have more pictures, pizzazz etc.)
http://www.thegreenbusiness.co.uk
There is no footer yet, and I need to add in some content to the sidebar on the right side of the page.
I also want to style the main content area a bit better and I will work on validation issues later.
Please can you offer any criticisms or suggestions for improvement.
Knock me down in flames if you must, but any negative or positive thoughts would be most welcome.
it's looking ok, but i'm not sure about the colours and such things.
Sorry if this is not the place for this type of question, but I respect your opinions.
Regards,Visually it's a very flat design with no real oomph to it. And I am not intending to mean that as negatively as it probably sounds. I believe in simple clean design, which this is, and it might be something I'd hand to the client for a feel out review. Simple helps keep the attention on information instead of eye candy. But you might be able to add a few simple visual touches just to add some depth or dimensional play.
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I don't know if there's a reason for restricting the width of the content area, but I'd widen it up to help reduce vertical scrolling. If the intention is to fill that side up with sponsor ads, then I guess that stalls that idea, though web pages that do that tend to bug me. Some such design approaches end up squeezing the content below all the ads.
I figure your request isn't asking, but due to my background in technical writing/editing and specialized graphics-oriented (GO) training I had relative to countering the tedium of reading such works, my instinct draws me to want to see what can be done about reducing words by introducing imagery that tells the story. Images carrying key information points can quickly get the take-aways across as opposed to reading thru paragraphs. So if you have a hand in deciding the actual page content, you might want to think about less words and more graphics/diagrams to get the messages across. With the limited space that's been alloted for the content, that picture that takes up so much room doesn't say anything meaningful that I can determine... but I'm not in the green business except for the tomatoes I hope will grow out next to the apple trees, so it may say it all(?). -
I want to run the 8x8 2D array from right to left interchanging:
the 1st col with the 7th,
the 2nd col with the 1st,
the 3rd col with the 2nd,
the 4th col with the 3rd,
the 5th col with the 4th,
the 6th col with the 5th,
the 7th col with the 6th
you know...
already I can run the secuence but I think that there is a better way... with "Heuristic" or something like that but I tried and I don't know how....
Please help me!
Thank You!
Solved!
Go to Solution.
Attachments:
Untitled 1.vi 15 KBHere's the same with much less code. (See also miy signature)
LabVIEW Champion . Do more with less code and in less time .
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AnimateLEDs.vi 10 KB
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How Can I Improve This Picture?
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I've got this picture of the Lone Pine in Monterey that's a nice wide shot of the tree and the cliff it's on... what's killing the picture I think is the brightness of the sun in the upper right and the relative darkness in the lower left... I'd like to even it all out but am not quite sure how to do that... basically, I'd like to brighten the reinforcements to bring out the stones without losing the detail on the water...
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How can I make a Day countdown timer in flash
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trace("Happy Birthday!");
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error message:
Description:
1084: Syntax error: expecting rightparen before colon.
Source:
var currentTime = today.getTime(12:00:00 PM)There are numerous syntax errors in your code, especially usage of Date methods - getFullYear, getMonth, etc. To begin with, this code should look like this:
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// register function
addEventListener(Event.ENTER_FRAME, daytimer_handler);
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function daytimer_handler(e:Event):void
// current date
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// display day string
var dayCounter:String = days;
timer_display.text = dayCounter;
else
trace("Happy Birthday!");
var newTime:String = "0";
timer_display.text = newTime;
removeEventListener('enterFrame', daytimer_handler); -
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Hi. Thanks for you response.
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Welcome to Apple Support Communities.
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