No Auto-concatenated strings in a (For / While) Loop ?
I saw that "auto-concatenated" was added to the Tunnel-mode of a For Loop. I was positively surprised as it looked very convenient to put it directly into use. However, the string characters I wanted to concatenate caused an error. Upon looking closer at this recently added feature I saw that it could concatenate arrays only. Of course I can convert the string into a byte array and (afterwards) back again, but it seemed an omission which might be added in a new Labview version.
Hi Ettepet,
my picture is a snippet.
Btw. that function is ConcatenateStrings...
@Neos:
You surely can concatenate arrays of varying length in the loop. So that shouldn't be the problem. Concatenation is memory-inefficient anyway, regardless of using a (new) output tunnel or the "traditional" way of BuildArray or ConcatString...
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome
Similar Messages
-
Wrong use of "Scan From String" function in a while loop?
Hi,
I've got a "Scan From String" function inside a while loop. On the first iteration it converts correctly the number passed by the input string (for example 4) But on the second one it has only spaces (one or more \s) as input string.
I expected to obtain a zero as output (as it does always that it can not make any conversions, as I am supposed to) but indeed, i subtracts 1 from the previous number (according to the number indicated as example I would obtain a 3 as output)
What's wrong with this?
Does the function fails on this case?
The rest of the diagram o the VI is expected to manage a 0 on that situation, like others in which the conversion is not made.
Andres.I have simplified the VI evading calls to other VIs and trying to reproduce the mistake.
The type of string I introduce to reproduce the mistake is:
clock 3 (30) clock (40)
Forgetting to introduce a number between the second "clock" and the following parenthesis, I would manage it programmatically with code that isn't included.
Then "Scan From String" is supposed to do not make a conversion. But it leaves a 2 as output (in this example)
I have realised, unbelievable but true, that it has matter with the number I substract to the output number (if it were 2, I would obtain 1 as output and so on)
Excluding that, I got the conversion made before as output, 3, on the second time that "Scan From String" executes. But, how can this func
tion as bad?
I am using LV4 on an old PC. I have tried to reproduce it with LV6 and it works. But it isn't desirable for me, I would have to convert a lot of VIs and surely I will find a lot of errors due to the conversion (I have already tried)
Attachments:
EXTCLOCK.VI 26 KB -
How to get the last error for while loop?
How to get the last error for while loop? I just want transfer the last error for while loop, but the program use the shift register shift all error every cycle.
What do you mean by "get" and "transfer"?
If the shift register is not what you want, use a plan tunnel instead.
Typically, programmers are interested in the first, not last, error.
Can you show us your code so we have a better idea what you are trying to?
LabVIEW Champion . Do more with less code and in less time . -
i have a for loop inside of while loop.when i press stop for while loop, i also would like to stop for loop.how can i solve this problem?thanks
Hi fais,
Following through with what JB suggested. The steps involved in replacing the inner for loop with a while loop are outlined below.
You can replace the inner for loop with a while by doing the following.
1) Right-click of the for loop and select "Repalce" then navigate to the "while loop".
2) Make sure the tunnels you where indexing on with the for loop are still indexing.
3) Drop an "array size" node on your diagram. Wire the array that determines the number of iterations your for loop executes into this "array size".
4) Wire the output of the array size into the new while loop.
5) Set the condition terminal to "stop if true".
6)Drop an "OR" gate inside the while loop and wire its output to the while loops condition terminal.
7) C
reate a local of the boolean "stop" button, and wire it into one of the inputs of your OR gate. This will allow you to stop the inner loop.
8) Drop a "less than" node inside the inner while loop.
9) Wire your iteration count into the bottom input of the "less than".
10) Wire the count (see step 4 above) into the top input of the less than. This will stop the inner loop when ever the inner loop has processed the last element of your array.
Provided I have not mixed up my tops and bottoms this should accomplish the replacement.
I will let others explain how to takle this task using the "case solution".
Ben
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction -
How to avoid Build Array function inside a For (while) Loop?
Hi there,
I have a simple question about how to avoid using Build Array function inside the loop. Now I want to remove the Build Array funtion inside the loop to improve the performance (To get better memory management). Any idea how to do that?
Thanks a lot!
Warmest regards,
ChongIt's been my experience that using the auto-indexing to build an array
on a For loop is just as good as initializing and replacing elements.
The For loop knows before it runs how many iterations it has to run and
can allocate the array ahead of time.
You're better off initializing and replacing when using a While loop
because it does not know how many iterations it will run and can't
pre-allocate the array ahead of time.
Ed
Ed Dickens - Certified LabVIEW Architect - DISTek Integration, Inc. - NI Certified Alliance Partner
Using the Abort button to stop your VI is like using a tree to stop your car. It works, but there may be consequences. -
How to create a time control for while loop?
Hello all,
I would like to control my while loop's execution time. In other words I want to stop while loop's execution after time (in ms) which is set by user. For example user sets 5 seconds to front panel control and a while loop runs and stops after 5 seconds.
I am not sure is it possible with the while loop. I succeed with the timed loop but it suits badly to my application. Is there any other loops for timed control if it is not possible with while loop? There is also a simple while loop with Random Number (0-1).vi as attachment.
Best Regards,
Jick
Solved!
Go to Solution.
Attachments:
execution time loop.vi 6 KBhi,
see this, may be it will help.
Best luck
Gaurav k
Gaurav k
CLD Certified !!!!!
Do not forget to Mark solution and to give Kudo if problem is solved.
Attachments:
execution time loop.vi 9 KB -
Execution time for while-loops?
Hi,
How can I measure the time used during one iteration in a while-loop?
DennisPrior to the loop get the time. Initialize a shift register in the loop with that time. Now - at the end of the code in the while loop get the time once again, and find the difference between the value in the shift register and the new time. Wire the new time to the right hand shift register terminal...when you loop the difference will now tell how long each iteration takes.
In the attached example I have usied the get ms timer value to get the current time. The ms timer loops though so there is a possibility that it will give an incorrect value just when it resets...normally that's not a big problem, unless you want to do something critical based on the loop time...
In the example the loop code is just an add operation and a wait until next multiple (to
make the loop use some time), you can remove all that and put in your own code, or better - just add the timer code to your own loop.
PS. The example illustrates one thing about the wait next ms function that people sometimes overlook; the first time it is run it does not have a start value to relate to so it won't wait the specified number of ms on the first iteration.
MTO
Attachments:
TimeTheLoop.vi 21 KB -
How I break while loop activity in BPEL process
Hi Guys,
I want to do a polling action in my bpel process, I put in the polling code in while activity ,
I try two way to do the break :
1. use the Flow activity , one sequence for while loop activity , one sequence for timeout flow , put waiting activity in it ,config timeout ... but Flow activity complete only when all branch complete . so it seems there is no way to break Flow from one branch.
2.use onalarm branch of scope ... put while activity code in a scope activity , create onalarm branch for this scope ,config the timeout time ... but onalarm branch can't bypass the scope sequence...
Any advice ?
Thanks
Kevin
Edited by: kyi on Oct 29, 2009 1:01 PMThe on-alarm branch of the scope should work.
Maybe not so neat but you could try to do a scope with a flow within that. Put in one of the flow-branches a wait. After the wait throw an exception.
You can catch that exception in a catch branch of the surrounding scope.
Regards,
Martien -
Hi,
I have retrieved a list of users. Each user having some attributes like manger id, user id, location. I have stored the result in one attribute named 'test'. Now i want to create a while loop so that each user is fetched and all the attributes of eaach user are getting fetched.
i have done the search on th basis of firstname and last name..here is the code
<set name='test">
<invoke name='funcname' class='classname'>
<ref>fname</ref>
<ref>lname</ref>
</invoke>
</set>
now i want to start a while loop using this
<ref>
<concat>
<s>test[#</s>
<ref>i</ref>
</s>]</s>
</concat>
</ref>
please tel me what should be the code for while loop so that all the entries are fetched for each userHi princy,
Can you tell me how are the attributes stored in each user?
Here test variable is a list,where each element of list represents a user.Now how attributes Like manager,location stored in it?can u clarify tht?
Thanks. -
For each loop to print a 3D array
I want to display the elements of my 3d uniform array but after each element I get a "null" also. Any idea why? I've tested with a 2d array and I don't have any problem. Any help is really appreciated.
public class Testari {
public static void main(String[] args) {
String[][][] my3DArray = new String[3][2][2];
my3DArray[0][0][0] = "a"; //3d uniform array
my3DArray[0][1][0] = "b";
my3DArray[1][0][0] = "c";
my3DArray[1][1][0] = "d";
my3DArray[2][0][0] = "e";
my3DArray[2][1][0] = "f";
for(String[][] x : my3DArray) {//for each loop
for(String[] y : x){
for(String z : y){
System.out.println(z + " ");
}What's 3 x 2 x 2?
How many elements did you explicitly set?
How many elements does that leave with their default value of null? -
Using while loops instead of for loops in arrays?
I am new to java and doing a java tutorial on using arrays and for loops. What im trying to find out is how it is possible to use a while loop instead.
I would be very grateful if anyone can suggest a way of changing my code to use a while loop.
The code I have written is:
public class DetermineGrade
public static void main(String[]args)
final char[] mark = {'A','B' ,'C' ,'D' ,'F' };
char [] grade = new char[5];
int [] Score ={95,35,65,75};
for (int i=0; i<4; i++)
if (Score >= 90)
grade= mark[0] ;
else if (Score >=80)
grade = mark[1] ;
else if (Score >=70)
grade = mark[2] ;
else if (Score >=60)
grade = mark[3];
else grade = mark[4];
for (int i=0; i<4; i++)
System.out.println("grade = " + Score + ", " + grade);
Thankyou LBIm trying to underdstand the differences in the
different loops. I can grasp the for loop but I dont
see how a while loop works, or how it id different
from the other?
for (j = INIT; j < MAX; j++) {
// do stuff
}is the same as
j = INIT;
while (j < MAX) {
// do stuff
j++;
}Lee -
Getting a for loop inside a while loop
I've been having problems with the code below. I'm trying to get the 'while' loop to work so that the program will continue to run after a user types in a sentence. This is supposed to print out how many times a letter has been typed when a sentence has been put in, but it's not working right. It just keeps adding the first sentences numbers together even when a new sentence is typed out. I don't know what I'm doing wrong with this 'while' loop.
import java.util.Scanner;
import java.util.*;
public class Count
public static void main (String[] args)
String phrase; // a string of characters
int countBlank; // the number of blanks (spaces) in the phrase
int length; // the length of the phrase
int countA = 0; // the number of a's in the phrase
int countT = 0; // the number of t's in the phrase
int countE = 0;
int countS = 0;
char ch; // an individual character in the string
Scanner scan = new Scanner(System.in);
// Print a program header
System.out.println ();
System.out.println ("Character Counter");
System.out.println ();
// Read in a string and find its length
System.out.println ("Enter a sentence or phrase ('quit' to quit): ");
phrase = scan.nextLine();
length = phrase.length();
// Initialize counts
countBlank = 0;
// a while loop to allow user to keep entering phrases
while (true)
String line=scan.nextLine();
System.out.println("Type quit to quit or enter a new phrase.");
if(line.equals("quit"))
break;
// a for loop to go through the string character by character
// and count the blank spaces
for(int i = 0; i < phrase.length(); i++)
ch = phrase.charAt(i);
switch (ch)
case ' ': countBlank++;
break;
case 'a':
case 'A': countA++;
break;
case 't':
case 'T': countT++;
break;
case 'e':
case 'E': countE++;
break;
case 's':
case 'S': countS++;
break;
// Print the results
System.out.println ();
System.out.println ("Number of blank spaces: " + countBlank);
System.out.println ("Number of A's: " + countA);
System.out.println ("Number of T's: " + countT);
System.out.println ("Number of E's: " + countE);
System.out.println ("Number of S's: " + countS);
System.out.println ();
}Ok well I don't really understand what you're saying, but here's an improved version of my code and I can get it to work, but I don't know how to turn the "do while" loop into just a "while" loop.
import java.util.Scanner;
public class Count3
public static void main (String[] args) {
String phrase; // a string of characters
int countBlank=0; // the number of blanks (spaces) in the phrase
int length; // the length of the phrase
char ch; // an individual character in the string
int countA=0;
int countE=0;
int countS=0;
int countT=0;
String quit = new String("quit"); //String wasn't initialized
Scanner scan = new Scanner(System.in);
// Print a program header
System.out.println ();
System.out.println ("Character Counter");
System.out.println ();
do { //do-while loop
// Read in a string and find its length
System.out.println("Enter a sentence or phrase, or type \"quit\" to quit: ");
phrase = scan.nextLine();
length = phrase.length();
// a for loop to go through the string character by character
// and count the blank spaces, a's, e's, s', and t's
for (int i = 0; i <= length-1; i++) {
ch = phrase.charAt(i);
switch (ch) {
case ' ': countBlank++;
break;
case 'a':
case 'A': countA++;
break;
case 'e':
case 'E': countE++;
break;
case 's':
case 'S': countS++;
break;
case 't':
case 'T': countT++;
break;
// Print the results
System.out.println ();
System.out.println ("Number of blank spaces: " + countBlank);
System.out.println ("Number of a's: " + countA);
System.out.println ("Number of e's: " + countE);
System.out.println ("Number of s's: " + countS);
System.out.println ("Number of t's: " + countT);
System.out.println ();
countA=0; countE=0; countS=0; countT=0; countBlank=0;
}while (!(phrase.equalsIgnoreCase(quit)));
}//end main
}//end class Count -
What are the different among "for", "while" and "do-while"?????
I am no clear when i ues one of them.
I mean in what condition I can use each of them?
what is each one's advantage?
Thank you everyone replying and leave any idea. @_@
<>is the same as:No it isn't (in example have used 3 instead of 25 so output is shorter:
public class Test {
public static void main(String[] args) {
for (int x = 0; x < 3; x++) {
System.out.println(x);
System.out.println("****");
int x = 0;
while (x++ < 3) {
System.out.println(x);
System.out.println("****");
int x = 0;
do {
System.out.println(x);
} while (++x < 3);
Replace your suggested while loop with:
int x = 0;
while (x < 25) {
//do something
x++;
}To the OP: All this should be covered in just about any introductory Java book or tutorial. Have you read any? If so, what in particular are you having trouble with understanding? If not, then go and do so. -
Function - Return More than One Value in a Concatenated String
Hi,
Is it possible for a function to return a concatenated string(combining more than one number). I am trying to return the PO number by inputting and invoice_id and code number but an invoice_id can have more than one PO with the same code number. I would like to concatenate the PO numbers with commas e.g.
10124, 10090, 10987
At the moment the function returns null for these cases that have more than one PO number.
ThanksAlso is is possible to create another function that can be called in the same script using the PO number as an IN parameter in SQL. See SQL below:
select cck.concatenated_segments as "Segment" ,
cc.code_combination_id,
NVL ( src . user_je_source_name , '**********' ) AS "Source" ,
NVL ( cat . user_je_category_name , '**********' ) AS "Category" ,
jel . period_name as "Period Name" ,
i.invoice_id as "Invoice ID",
s.vendor_name as "Vendor Name",
s.segment1 as "Supplier No",
jeb . name as "Batch Name" ,
func_get_po(i.invoice_id, cc.code_combination_id) "PO No",
jeh . name AS "Header Name" ,
jel . description AS "Description" ,
jel.accounted_dr AS "Debit" ,
jel.accounted_cr AS "Credit" ,
NVL(jel.accounted_dr, 0) - NVL(jel.accounted_cr, 0) AS "Net Amount"
FROM apps.gl_code_combinations cc ,
apps.gl_code_combinations_kfv cck,
apps.gl_je_lines jel ,
apps.gl_je_headers jeh ,
apps.gl_je_batches jeb ,
apps.gl_je_categories cat ,
apps.gl_je_sources src,
apps.gl_import_references r,
apps.xla_ae_lines al,
apps.xla_ae_headers ah,
apps.xla_events e,
xla.xla_transaction_entities te,
apps.ap_invoices_all i,
apps.ap_suppliers s
WHERE ( cck.concatenated_segments BETWEEN '23.83545.141.000.00.23.000.000' AND '23.83545.141.000.00.23.000.000'
AND cc.CHART_OF_ACCOUNTS_ID = 50328
AND jeh.LEDGER_ID IN
(select acc.ledger_id
FROM apps.gl_access_set_ledgers acc
WHERE acc.access_set_id = 1000
AND jel.code_combination_id = cc.code_combination_id
AND cck.code_combination_id = cc.code_combination_id
AND jel.status
|| '' = 'P'
AND ( jel.accounted_dr != 0
OR jel.accounted_cr != 0 )
AND jeh.je_header_id = jel.je_header_id
AND jeh.actual_flag = 'A'
AND 1 = 1
AND jeh.currency_code != 'STAT'
AND jeb.je_batch_id = jeh.je_batch_id
AND jeb.average_journal_flag = 'N'
and src.je_source_name = jeh.je_source
and cat.je_category_name = jeh.je_category
and r.je_header_id(+) = jel.je_header_id
and r.je_line_num(+) = jel.je_line_num)
AND ( :period_name = jel.period_name
and al.gl_sl_link_id(+) = r.gl_sl_link_id
and al.ae_header_id = ah.ae_header_id(+)
and al.application_id = ah.application_id(+)
and ah.application_id = e.application_id(+)
and ah.event_id = e.event_id(+)
and e.application_id = te.application_id(+)
and e.entity_id = te.entity_id(+)
and nvl(te.source_id_int_1,-99) = i.invoice_id(+)
and i.vendor_id = s.vendor_id(+) )
AND ( jel.ledger_id = 2041)
ORDER BY src.user_je_source_name ,
cat.user_je_category_name ,
jeb.name ,
jeh.name ,
cck.concatenated_segments ,
jel.je_line_num
I am using func_get_po(i.invoice_id, cc.code_combination_id), I would like to call another function in this script that uses the PO number as an IN parameter.
For example func_get_po_requester(i.invoice_id, cc.code_combination_id, func_get_po(i.invoice_id, cc.code_combination_id))
Would this work?
Thanks -
Using Javascript to create concatenated string from checkbox fields to one text field
Hi. I have a PDF form that I am trying to have output to a spreadsheet that matches my database schema. Here is the dilemna:
* I have a set of checkboxes for available languages (LANGUAGE_ENGLISH, LANGUAGE_SPANISH, etc.) When they export to spreadsheet, the value is TRUE.
* I need to take values from checked boxes and create a single string in a text field called LANGUAGE_DISPLAY (so my UI will not need to do the concatenation). If LANGUAGE_ENGLISH is TRUE (checked), append "English, " to LANGUAGE_DISPLAY, else append "". Then, if LANGUAGE_SPANISH is TRUE (checked), append "Spanish, " to LANGUAGE_DISPLAY, else append "". And on and on
In the LANGUAGE_DISPLAY text field properties, I am inserting a Custom Calculation script to try to achieve this, but am not getting any results. I tried teh following even trying to pull the checkboxes default values and string them together:
box1 = this.getField("LANGUAGE_ENGLISH").value.toSrting();
box2 = this.getField("LANGUAGE_FARSI").value.toSrting();
box3 = this.getField("LANGUAGE_MANDARIN").value.toSrting();
event.value = box1 + ', ' + box2 + ', ' + box3;
I also played with this to get the desired strings output...but to no avail:
if ( LANGUAGE_ENGLISH.rawValue == true )
box1.rawValue = "English, ";
if ( LANGUAGE_FARSI.rawValue == true )
box1.rawValue = "Farsi, ";
if ( LANGUAGE_HEBREW.rawValue == true )
box1.rawValue = "Hebrew, ";
event.value = box1 + box2 + box3;
Then I tried to simplify to see one field output so used this script...still no results:
event.value = "";
var f = this.getField("LANGUAGE_ENGLISH");
if ( f.isBoxChecked() == true) {
event.value = "English";
Couple questions:
1) Am I on the right track with any of these scripts?
2) Is there something else I need to do to get the script to run before running the Create Spreadsheet with Data Files comman in Acrobat to get my csv file output? Maybe there needs to be some event to get the checkbox values read by that field in order to calculate/create the string.
Appreciate any help you can provide.LiveCycle Designer has shipped with all Acrobat Professional versions since the "Professional" version was introduced with version 6.
You do not let us know want results you get in the field or the JavaScript console.
Using:
box1 = this.getField("LANGUAGE_ENGLISH").value.toString();
box2 = this.getField("LANGUAGE_FARSI").value.toString();
box3 = this.getField("LANGUAGE_MANDARIN").value.toString();
event.value = box1 + ', ' + box2 + ', ' + box3;
returns "Off, Off, Off", when no box is checked and returns "Yes" for the appropriate box being checked when the default value is used for the creation of the check box. So if one would make the 'Export Value' of the box from the default value of 'Yes" to the appropriate language, one would get a more desirable result. But for each unchecked box the value would appear as "Off". So one needs to change the 'Off' value to a null string. But one is still left with the separator when there is an unchecked option.
Using the following document level function:
// Concatenate 3 strings with separators where needed
function fillin(s1, s2, s3, sep) {
Purpose: concatenate up to 3 strings with an optional separator
inputs:
s1: required input string text or empty string
s2: required input string text or empty string
s3: required input string text or empty string
sep: optional separator sting
returns:
sResult concatenated string
// variable to determine how to concatenate the strings
var test = 0; // all strings null
var sResult; // re slut string to return
// force any number string to a character string for input variables
s1 = s1.toString();
s2 = s2.toString();
s3 = s3.toString();
if(sep.toString() == undefined) sep = ''; // if sep is undefined force to null
assign a binary value for each string present
so the computed value of the strings will indicate which strings are present
when converted to a binary value
if (s1 != "") test += 1; // string 1 present add binary value: 001
if (s2 != "") test += 2; // string 2 present add binary value: 010
if (s3 != "") test += 4; // string 3 present add binary value: 100
/* return appropriate string combination based on
calculated test value as a binary value
switch (test.toString(2)) {
case "0": // no non-empty strings passed - binary 0
sResult = "";
break;
case "1": // only string 1 present - binary 1
sResult = s1;
break;
case "10": // only string 2 present - binary 10
sResult = s2;
break;
case "11": // string 1 and 2 present - binary 10 + 1
sResult = s1 + sep + s2;
break;
case "100": // only string 3 present - binary 100
sResult = s3;
break;
case "101": // string 1 and 3 - binary 100 + 001
sResult = s1 + sep + s3;
break;
case "110": // string 2 and 3 - binary 100 + 010
sResult = s2 + sep + s3;
break;
case "111": // all 3 strings - binary 100 + 010 + 001
sResult = s1 + sep + s2 + sep + s3;
break;
default: // any missed combinations
sResult = "";
break;
return sResult;
And the following cleaned up custom calculation script:
box1 = this.getField("LANGUAGE_ENGLISH").value;
box2 = this.getField("LANGUAGE_FARSI").value;
box3 = this.getField("LANGUAGE_MANDARIN").value;
if (box1 == 'Off') box1 = '';
if (box2 == 'Off') box2 = '';
if (box3 == 'Off') box3 = '';
event.value = fillin(box1, box2, box3, ', ');
One will get the list of languages with the optional separator for 2 or more language selections.
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Pick the message without recordsetstructure,*
Hi all, I want pick the message from sender without specifing in the field Recordset structure as Recordset,* in fcc 2 file scenario ex: we are mentioning in recordset structure as row,* then receiver picking all fields data. but i want select the al