previous element in the array perl


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting previous element in the array perl
# 1  
Old 09-26-2011
Data previous element in the array perl

Hi, How to get previous/next element in the array perl

Example
Code:
@queue = (1, 2 ,3 , 4);

I want to get value of 1 and 2, or, 2 and 3, or 3 and 4...etc and compare to value which one is greater to do that I need to get previous and next element of array ?
# 2  
Old 09-26-2011
Code:
perl -e '
@queue = (1, 2, 3, 4);
print for map { "$queue[$_], $queue[$_+1]\n" } 0...$#queue-1'
1, 2
2, 3
3, 4

But I think I didn't understand you.
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

Array Element

This question is for someone that's more familiar with Array Element. I need to know if the maximum array element that can be assigned is 1024 and if its so, Is there a workaround solution when the counter exceeded 1024? param_array="$param_nam" counter=$counter+1 #to avoid space... (3 Replies)
Discussion started by: cumeh1624
3 Replies

2. Shell Programming and Scripting

Perl: How to check whether my array contains element x

Hi All, I am new to perl I am stuck in simple problem I need your help I want to define a subroutine. sub check_if_entity_exists(@array_to_be_checked,$entityName) I have array as http-listener-1 http-listener-2 http-listener-3 http-listener-4 If i send http-listener-3 my... (1 Reply)
Discussion started by: javaholics
1 Replies

3. Shell Programming and Scripting

Multiplying array element

I am trying to take all the elements of an array and multiply them by 2, and then copy them to a new array. Here is what I have i=0 for true in DMGLIST do let DMGSIZES2="${DMGSIZES}"*2 let i++ done unset i echo ${DMGSIZES2} It does the calculation correctly for the first element,... (7 Replies)
Discussion started by: nextyoyoma
7 Replies

4. Shell Programming and Scripting

Perl: One action if an element doesn't exist in array

Hello, I want to run one (not multiple) action if an element doesn't exist in array. for example: @array = (1..10); foreach $el (@array) { if ($el != 11) { print "number not found\n"; } } the output of this simple script: number not found (3 Replies)
Discussion started by: ahmed_zaher
3 Replies

5. Shell Programming and Scripting

remove an element from array

I need to remove an element from the below array variable TABLENAME. #!/bin/ksh set -A TABLENAME "mirf roxar keke mirs" echo "the array is ${TABLENAME}" If i need to remove say keke and have the final TABLENAME as below, how this could be achieved. Pls throw some light. echo "Modified... (3 Replies)
Discussion started by: michaelrozar17
3 Replies

6. Shell Programming and Scripting

HELP unsetting array element in loop

I have a loop and I need to be able to unset the array element that I am currently accessing in it. I was thinking of making a counter that increments with the loop and doing unset $dirs but if I do that I am not sure if the other members of the array would get shifted down in index (meaning that... (2 Replies)
Discussion started by: msf5042
2 Replies

7. Shell Programming and Scripting

Shift array element

I want to delete and 0th element of array in shell scrpit and also shift all others to one level up. (2 Replies)
Discussion started by: darshakraut
2 Replies

8. Shell Programming and Scripting

Remove an element from an array in PERL

Hello guys, I have the following question. Consider the following code in PERL for($xeAnumber=0; $xeAnumber<@xeAnumber; $xeAnumber++) { if(@xeAnumber==@final_file) { @final_file=@xeTimeStamp; }... (3 Replies)
Discussion started by: chriss_58
3 Replies

9. Shell Programming and Scripting

Perl delete an element from array

Probably I am not seeing it or I am not using the "delete" correctly I had the following codes but it does not work for me #!/bin/perl -w ... @sysFile1 = (a_b, a_c, a_d); @sysFile2 = (a_c, a_e, b_f); foreach $line1 (@sysFile1){ trim(\$line1); (my $tmp1, my $tmp2) = split/_/,... (6 Replies)
Discussion started by: ahtat99
6 Replies

10. Shell Programming and Scripting

accessing my first element of array

Hello everyonel, I have an array set like so num=4 read name arr=name I go through while loop to assign different values to different array element from 1 to 4. when I try to access the FIRST element of the array I get the last one first. Like if I say ${arr} it will show the last element... (4 Replies)
Discussion started by: afadaghi
4 Replies
Login or Register to Ask a Question