Increment nested for loop parllely Post: 302231088

Sponsored Content

Top Forums Shell Programming and Scripting Increment nested for loop parllely Post 302231088 by drl on Monday 1st of September 2008 03:15:17 PM

09-01-2008

Registered User

Hi.

It is not clear what your goal is. In your construction, every time you enter the inner loop, the sequence will begin again -- that's the nature of the loop.

Here's how I would do this, but it is guessing what you are trying to accomplish:

Code:

#!/bin/bash -

# @(#) s2       Demonstrate array use for processing in parallel.

# See http://www.tldp.org/LDP/abs/html/arrays.html for details on
# arrays.

echo
echo "(Versions displayed with local utility \"version\")"
version >/dev/null 2>&1 && version "=o" $(_eat $0 $1)
set -o nounset

echo
echo " Results:"

no1=( 1 6 5 4 8 )
no2=( 4 7 8 0 1 )
length=${#no1[*]}
echo " length is $length"

i=0
while (( i < length ))
do
  echo iteration $i no1[$i] = ${no1[$i]}, no2[$i] = ${no2[$i]}
  (( i++ ))
done

exit 0

Producing:

Code:

% ./s2

(Versions displayed with local utility "version")
Linux 2.6.11-x1
GNU bash 2.05b.0

 Results:
 length is 5
iteration 0 no1[0] = 1, no2[0] = 4
iteration 1 no1[1] = 6, no2[1] = 7
iteration 2 no1[2] = 5, no2[2] = 8
iteration 3 no1[3] = 4, no2[3] = 0
iteration 4 no1[4] = 8, no2[4] = 1

See Arrays ... cheers, drl

drl

View Public Profile for drl

Find all posts by drl

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

nested loop

I have two do loops. When I break of the inner loop it doesn't go back to the outer loop but exit the program.

2. Shell Programming and Scripting

Increment date in 'for' loop?

Hi Guys, My first post..:) Right...I want to move existing files (with some date in their name) currently in $mainftp, to $mainfolder/$foldate/system1. I'd like to be able to increment date in the for loop? Is this possible or should I use a different technique. The script return the...

3. Shell Programming and Scripting

the given code goes in infinite loop and does not increment variable i

code is as #!/bin/sh i=1; while do welcome $i times; i='expr $i+1'; done exit 0;

4. Programming

[Xquery] How to do a increment in a For loop

Hello men. How can i build a simple increment for $a by Xquery such as ? let $a := 0 for $i in (1 to 10) let $a := $a + 1 return $a why a in this loop always is '1' Thank you for reading, its will really helpful for my job if i can solve this problem :D:D

5. Shell Programming and Scripting

Nested if loop

Hi Team, I just want to check whether my nested if loop used is correct or not. if ] if ] export1 else export2 fi else if ] export3 else export4 fi fi Thanks Shiva

6. Shell Programming and Scripting

For/While Loop to Increment Filenames in a Script

Daily stupid question. I want to increment the file name everytime the script is run. So for example if the filename is manager.log and I run the script, I want the next sequence to be manager.log1. So to be clear I only want it to increment when the script is executed. So ./script...

7. Shell Programming and Scripting

Find and increment at each occurence of string (loop)

I created script (sh shell) to generate vlc playlist based on some data files. All works fine so far except one string I do not know how to handle with. VLCSTART='<vlc:id>' VLCV=0 VLCEND='</vlc:id>' echo -e $'\n'$'\t'$'\t'$'\t'$'\t'\$VLCSTART$VLCV$VLCENDOutput file contains several occurences...

8. Windows & DOS: Issues & Discussions

Batch file loop and increment value for condition

I am trying to have the below batch file do following two things: 1. only allow the values YES,yes,Y,y, or NO,no,N,n 2. increment the counter %var1 only if answer to question 2 is "y" and not able to get the syntax correct. If %var1%=1 then I am trying to display function :end. Thank you :)....

9. Shell Programming and Scripting

Parallel increment of nested for loop

Hi, I am using solaris 5.10 environment and need help on doing parallel increment of nested for loop. Samples #inside the code the values assigned to a variable by another awk command will be like a=/xyz/pg/as /xyz/pg/as2 /xyz/pg/as3 b=/xyz/sd/fd1 /xyz/sd/fd2 /xyz/sd/fd3 for q in...

LEARN ABOUT X11R4

echo

ECHO(1)                                                            User Commands                                                           ECHO(1)

NAME

       echo - display a line of text

SYNOPSIS

       echo [SHORT-OPTION]... [STRING]...
       echo LONG-OPTION

DESCRIPTION

       Echo the STRING(s) to standard output.

       -n     do not output the trailing newline

       -e     enable interpretation of backslash escapes

       -E     disable interpretation of backslash escapes (default)

       --help display this help and exit

       --version
              output version information and exit

       If -e is in effect, the following sequences are recognized:

       \     backslash

       a     alert (BEL)

            backspace

       c     produce no further output

       e     escape

       f     form feed

       
     new line

       
     carriage return

       	     horizontal tab

       v     vertical tab

       NNN  byte with octal value NNN (1 to 3 digits)

       xHH   byte with hexadecimal value HH (1 to 2 digits)

       NOTE: your shell may have its own version of echo, which usually supersedes the version described here.  Please refer to your shell's docu-
       mentation for details about the options it supports.

AUTHOR

       Written by Brian Fox and Chet Ramey.

REPORTING BUGS

       GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
       Report echo translation bugs to <http://translationproject.org/team/>

COPYRIGHT

       Copyright (C) 2017 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

       Full documentation at: <http://www.gnu.org/software/coreutils/echo>
       or available locally via: info '(coreutils) echo invocation'

GNU coreutils 8.28                                                 January 2018                                                            ECHO(1)