Sorting Arrays in a Vector by a String field in the array

Hi
i have a Vector where i put Arrays in. These Arrays are all of the same type. The first field is kind of an indetifier, the type is String. That's the key field i'd like to sort the vector elements in an alphabetical order.
I know there is that Collator methode to sort Vectors. That's no problem for me to do if i just have Strings in the Vector. But with this contruct of Arrays that need do be sortet for one fiel of the array, i have no idea whether this might be done with that Collator methode too.
So, before i start written some kind of bubble sort methode (that sure would solve the problem, but probably not very smart and fast...) I'd like to ask you, whether you have an idea how to solve that problem with Collator or even with some other methode?
thanks for your help!

Comparable and Arrays.sort. Read the APIs, or look at the two or three examples I've done so far today in this forum. Or search the forum for +Comparable Arrays sort
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Truncate numbers from string field

Afternoon all,
This time I'd like to extract only 2 strings out of a string field. The field is of sales area which contains numbers and letters. For example, Scotland is given a number 01, West midlands is 02, Ireland however is given IR.
however, the field which holds the information is like, 012, where 01 is the area number and 2 is type of area number.
The information which we are interested in is first two strings.
I have tried this in the formula given below but it doesn't work, it states a field is required
If hasvalue({?Sales Area}) then
totext(Minimum({slslsp.slr_slsperson}[1 to 2])) + " - " +
totext(Maximum({slslsp.slr_slsperson}[1 to 2]))
else
"n/a"
Should I be using a truncate and if yes then how?
P.S. This is to show only the sales area number or text if selected under a parameter. The values of the parameter will stay the same. In other words it is just to show in the report.
Many thanks once again
Regards
Jehanzeb

Is it a range parameter? If so try this
If hasvalue({?Sales Area}) then
totext(Minimum({slslsp.slr_slsperson})[1 to 2]) + " - " +
totext(Maximum({slslsp.slr_slsperson})[1 to 2])
else
"n/a"
regards,
Raghavendra.G
Edited by: Raghavendra Gadhamsetty on Jan 16, 2009 4:16 PM

Filter anomaly with string fields

Is anyone else have an issue with string fields and filtering? What I notice is if I choose a custom string field in the metadata filter bar I'll see the usual list in the column like:
All (2 values)
     50
String 1
       2
No Value
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If I choose All or an actual entry (like String 1) the correct images are filtered. However if I choose No Value I don't see 48 images but only the images I would see if I had chosen String 1. The built in string fields (such as Label) don't behave in this fashion.
Is this a bug or something I can program around?

Thanks Eric. Just use the custom metadata sample plugin from the SDK. It exhibits the same behavior. Everything works fine so long as EVERY image has an entry in the string field. If any are empty the filter shows a No Value line. This doesn't happen for the builtin string fields. They do not show that line in the filter bar.
Choosing the No Value line does not show you the images that actually have no value in the field but some other group of images, some with values and some without.

TreeSet vs Collection.Sort / Array.sort for Strings

Gurus
I am pondering weather to use TreeSet vs the Collections.sort / Array.sort for sorting Strings.
Basically I have a list of Strings, i need to perform the following operations on these Strings
1) Able to list Strings starting with a Prefix
2) Able to list Strings Lexically greater than a String
Any help would be greatly appreciated!
Thanks a bunch

SpaceShuttle wrote:
Gurus
I am pondering weather to use TreeSet vs the Collections.sort / Array.sort for sorting Strings.
Basically I have a list of Strings, i need to perform the following operations on these Strings
1) Able to list Strings starting with a Prefix
2) Able to list Strings Lexically greater than a String
Any help would be greatly appreciated!
Thanks a bunchBig-O wise, there's no difference between sorting a list of N elements or inserting them one by one in a tree-set. Both take O(n*log(n)). But both collections are not well suited for looking up string that start with a certain substring. In that case you had better use a Patricia tree (or Radix tree).
Good luck.

Sorting of Vector which contains String

Hi,
I have the following code which contains a vector. The vector has String elements. Now I want to know how to sort the elements in the Vector. I know that there is Collections.sort(). But I want to sort the elements needless it is uppercase or lowercase. The Collections Sort method will sort all uppercase strings first and then sort the lowercase ones. Here is the code which I`m doing: -
                      Vector v = new Vector();
               v.add("three");
               v.add("one");
               v.add("two");
               v.add("ABC");
               v.add("abc");
               v.add("AA2");
               v.add("ZXY");
               v.add("SuPer");
               v.add("4XDR");
               Collections.sort(v);
               System.out.println(v);I want to get the output something like this:
4XDR, AA2, ABC, abc,one,SuPer,three , two, ZXY

write a comparator and implement the compateTo method for your objects, so you get the output you need by calling
Collections.sort(List<T> list, Comparator<? super T> c)

Exception handling in sorting arrays

Hi all, I have a problem with the use of the built in java sort fo arrays. My program works on an array with 4 or 5 entities. When I run it in some folders it works but not in others. I get the following error after compilation, where "ResultData" is the class of array to be sorted:Exception in thread "main" java.lang.NullPointerException
at ResultData.compareTo(TextEdit.java:1215)
at java.util.Arrays.mergeSort(Arrays.java:1064)
at java.util.Arrays.mergeSort(Arrays.java:1071)
at java.util.Arrays.mergeSort(Arrays.java:1072)
at java.util.Arrays.mergeSort(Arrays.java:1071)
at java.util.Arrays.mergeSort(Arrays.java:1071)
at java.util.Arrays.mergeSort(Arrays.java:1071)
at java.util.Arrays.sort(Arrays.java:1014)
at java.util.Collections.sort(Collections.java:78)
[\code]Can any one give a suggestion?

Here is the code for the class "ResultData"class ResultData implements Comparable
     String file1;
     String file2;
     double var, var1, var2;
     public ResultData(String f1,String f2,double v, double x, double y)
               file1= f1; file2=f2;
               var=v; var1=x; var2=y;
     public String getFile1Name()
          return file1;
     public String getFile2Name()
          return file2;
     public double getVar()
          return var;
     public double getVar1()
          return var1;
     public double getVar2()
          return var2;
     public String toString()
          return file1+"          "+file2+"          "+var+"          "+var1+"          "+var2;
     public int compareTo(Object o)
          ResultData r= (ResultData)o;
          double result = this.getVar()- r.getVar();
          if (result < 0.0)         return -1;
          else if(result > 0.0)     return 1;
          else return 0;
} // ends class ResultData

Sun C++ std::sort coredump during sorting array of long values

Hello,
I got core dump during execution following test program on both Solaris 9 (compile by CC: Sun C++ 5.5 Patch 113817-19 2006/10/13) and Solaris 10 platforms (compile by CC: Sun C++ 5.9 SunOS_sparc Patch 124863-01 2007/07/25).
Core is dumped during sorting array of about 120k elements of unsigned long types using STL std:sort. The input data is available at link: [file.txt|http://www.savefile.com/files/1924004]
When I change sorting methods to std::stable_sort program works fine.
The funny thing is that when I change order of last two values of input data (swap), sorting is successful with std::sort.
Can anyone tell me if it is Sun C++ compiler bug ?Can I use std::stable_sort method safely?
Below code:
#include <iostream.h>
#include <fstream.h>
#include <set>
#include <string>
int main( int argc, char** argv )
char readStr[256];
ifstream file;
unsigned long *l;
int i=0;
l = new unsigned long[119016];
if (l ==0)
    cout << "Error in allocate memory";
    return -1;
file.open("file.txt");
if (!file)
    cout << "Error in openening file";
    return -1;
while(file.getline(readStr, 256,'\n'))
    cout << readStr<<endl;
    l= atol(readStr);
cout << l[i]<<endl;
i++;
std::sort(l,l+119016); //core dump here!!!
for (i=0;i<119016;i++)
cout <<l[i]<<endl;
file.close();
delete [] l;
return( 0 );
Greetings
Robert

You have run into bug 6588033 "std::sort from libCstd loops", which is fixed in current patches.
Get the current patches for Sun Studio and also the current patch for the C++ runtime libraries (SUNWlibC patch).
You can find them here:
[http://developers.sun.com/sunstudio/downloads/patches/index.jsp]
Sun C++ 5.5 probably does not have the fix, since it is quite old and falling out of support.
C++ 5.9 does have the fix.

I need sorting VI that returns the sorted array element's positions in the unsorted array

I need a VI that will very quickly (n log n) sort a 1D array of doubles. This VI should not only output the sorted array, but for each of the sorted array elements, it should also output that sorted array element's position in the unsorted array. So for example if the input array were:
unsorted_array
4.1
2.3
7.0
5.6
10.2
Then the output arrays would be:
sorted_array
2.3
4.1
5.6
7.0
10.2
indices_array
1 (the value 2.3 is located at position 1 in the unsorted_array)
0 (the value 4.1 is located at position 0 in the unsorted_array)
3 (the value 5.6 is located at position 3 in the unsorted_array)
2 (the value 7.0 is located at position 2 in the unsorted_array)
4 (the value 10.2 is located at position 4 in the unsorted_array)
This way I could generate the sorted_array using just the indices_array and the unsorted_array. Has anyone written a nifty piece of code to do this? I did some research on (n log n) sorting algorithms but most of them use recursion which I don't know how to do in LabVIEW. It would also be nice to have an algorithm like this that could sort an array of strings.
cheers,
Richard

Try something like the attached example (LabVIEW 7.0). I think it does what you need.
(To understand the code, it is important to know that arrays of clusters are sorted by the first element in the cluster).
Sort array itself sorts also array of strings, so you could just substitute, keeping the rest of the code the same.
Sort array uses a variation of quicksort, so it should have about NlogN complexity.
(If you think you only need the array of indices to later generate the sorted array, it does not make much sense to even do it. To get the indices, you need to sort the array anyway. You should just sort the plain array directly.
Message Edited by altenbach on 07-13-2005 03:47 PM
LabVIEW Champion . Do more with less code and in less time .
Attachments:
SortAndIndex.vi ‏26 KB

Sorting array

I know how to sort the array of strings alpha numerically but my problem is that the numerical values will not follow there corresponding strings
here is the code i am using:
Harold Timmis
[email protected]
Orlando,Fl
*Kudos always welcome
Solved!
Go to Solution.
Attachments:
testingfileIO.vi ‏35 KB

Hi.
It's nice to have "sorting array" icon.
But I have problem with programming similar option. I want to sort my sine samples taken in more periods to just one period.
Beside defining that mycurrent sample should be less than next one, and greater from previous one in one case, I should take in consider that derivation could be positive or negative. While negative derivation, next sample should be less then current and so one.
Can someone help me with programming?
I've extracted the first period, and then I have to go trough each sample and compare him. When logic is well,I get the index and putinsert elemt in array.
I think that I'm having problem with while loops. I don't know where to put them.
I'm attaching VI. beacuse I'm working on Labview 9.0, I'm attaching also a pic.
Thanks in advance.
Attachments:
resampling.vi ‏89 KB
Untitled.jpg ‏135 KB

CompareTo and Sorting Arrays

I am trying to sort an array of telephone directory information by last, first names, but am having trouble understanding how to use the compareTo method to do so. I thought I could use Arrays.sort, but this doesn't seem to work....any help would be appreciated.
public static Person [] sort(Person [] people) {
Person [] sorted = Arrays.sort(people);
return (Person[])sorted.toArray(new Person[sorted.size()]);
}/* end sort method */
//From Person class
public int compareTo(Object o) {
Person p = (Person)o;
int temp;
if((temp=getLastName().compareTo(p.getLastName())) == 0)
if((temp=getFirstName().compareTo(p.getFirstName())) == 0)
//not sure what to do here
return temp;
}

You want to return a negative or positive or zero integer if this item is less than, greater than, or the same as, the object passed as an argument, right? (Read the API.)
You're trying to sort by last name first, and if they're the same, then the first name, right?
So you're not really checking for zero, you're checking for non-zero.
I'm assuming that first name and last name are given by strings, which implements Comparable. So you can do:
public int compareTo(Object o) {
Person p = (Person)o;
int temp = getLastName().compareTo(p.getLastName());
if (temp != 0)
return temp;
// implicit else here
// MORE CODE GOES HERE
}I'll let you do the "MORE CODE GOES HERE" as an exercise.
BTW if you're implementing Comparable, you should probably be overriding equals() as well.

Removes duplicates from a sorted array without having to create a new array

Funcation removes duplicates from a sorted array without having to create a new array

Funcation removes duplicates from a sorted array
without having to create a new arrayIs a 'funcation' like a vacation but more fun or
something?LMFAO. You just jumped with both feet on one of my biggest peeves. I've been outed!
Actual words/phrases I've seen used which I hate with every fiber of my being:
"Mrs. Freshly's"
"McFlurry"
"Freshissimo"
"Spee-dee"
"Moons Over My Hammy"
One of my favorite SNL skits had Will Ferrell leading a panel of movie reviewers (they're the worst for this kind of junk). Each one had some cheesy pun to describe their respective movie. Ferrell topped the show off with his endorsement of "Fantasia 2000 is Fantasgreat!"
LOL.
"Come to Slippy Village - it's a FUNCATION!"
§ (runs off, laughing maniacally, head explodes)

Sort String Field Mandatory in Production Order Components Screen

Hi Gurus,
Am currently working on ECC 6.0 environment.
When I try to assign a batch to the components of the production order, the 'Sort String' is a mandatory field.
Can you please suggest from where is this mandatory field is picked? Is it possible to populate the field automatically? Or how to make the 'Sort String' field not mandatory?
In order type parameters (OPL8), standard parameters for display profiles are maintained.
Have also tried to maintain user parameters like F1F, S3F and S5F without success.
Your guidance please.
Thanks in advance.
The above mentioned problem does not occur if I try to create production order without reference of planned order using T Code CO01. This problem occurs only when I am converting planned order to production order.
Note that have tried maintaining sort string in the BoM. The sort string gets picked up when am creating manual production orders. Not copied when converting planned orders to production orders.
Tarang
Edited by: Tarang Machhar on Sep 28, 2010 7:23 PM
Edited by: Tarang Machhar on Sep 28, 2010 7:28 PM

Hi Tarang,
I think there is a transaction/screen variant maintained for that. Ask your ABAP team member to debug and check if there is any coding done to make it mandatory. There is no customizing for this one. There must be some code written to make it mandatory.
But you are correct, if you maintain the sort string in BOM, it gets copied on to the planned order, the reservation and the production order as well.
Regards,
Pradeep.

Sorting array list

can u please give me the source code for:
sorting array list for ascending and descending order

You already have the source code.

Sorting array vs sorting paginated array

...pulling in a long list of photos in a gallery, and I have
a sort function working within the pages of data fine. I need to
bring it back out of the paging stuff so that it sorts the data,
THEN passes to the paging function.
My data comes from mysql > php > xml > Flex into an
ArrayCollection, referred to in MXML as {acSlides}.
Pass the array collection to the paging system like:
<utils:FXCPager id="fxcPager" pageIndex="{currentPage}"
pageSize="{pageSize}" dataProvider="{acSlides}" />
then assign in repeater:
<mx:Repeater id="slideRepeater"
dataProvider="{fxcPager.pageData}">...</>
There is a button for sorting that calls a function a la:
private function sortByRating():void {
var sort:Sort = new Sort();
sort.fields = [new SortField("rating",false,true)];
fxcPager.pageData.sort = sort;
toggleRating = false;
fxcPager.pageData.refresh();
What do I need to do to get this sort function to work on the
{acSlides} array collection instead of {fxcPager.pageData} ???
Thanks!

OK I have resolved the error by importing the class adGroup. However now I am back to the original problem which is how to sort the DisplayName alphabetically and keep the associated link in tact. I created the class to avoid sorting parellel arrays but I am afraid it solved nothing as I have no idea how to sort the class. I tried just sorting it like an array:
Arrays.sort(bAD.getGroups()but receive the following error:
java.lang.ClassCastException: com.mylbean.adGroup incompatible with java.lang.Comparable
at java.util.Arrays.mergeSort(Arrays.java:1160)
at java.util.Arrays.sort(Arrays.java:1131)
>
I would assume this message is caused because I cannot sort a class array using this method. But being newer to Java I really have no idea how to get the class to sort by DisplayName before displaying to the user.
So at this point the code works fine but how do I display alphabetically? All suggestions are appreciated.

Index of sorted array

I have a unsorted array as follows:
array_index = {0 1 2 3 4 5 6 7 8}
array = {1 2 4 3 4 3 4 2 1}
I would like to get the previous index of sorted array as follows:
old_index = {2 4 6 3 5 1 7 0 8}
arrray.sort doesn't return the index the previous index, please help me.

You can do that using by creating an array containing the numbers 0 to n in increasing order and sorting that using a comparator that actually compares the content of the original array at the indices provided to it instead of the values themselves.
But why would you need that? Could you describe your requirement in a broader scope?

Sorting Arrays in a Vector by a String field in the array

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