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# 1  
Old 01-03-2011
Perl Array Condition
Hello,

I want to check if all element of an array have the same value regardless the length of the array.

example:
Code:
@array1 = qw(44 44 44 44);
@array2 = qw(55 55 55 55 55 55 55);

Please advice,
Ahmed
# 2  
Old 01-03-2011
Code:
perl -E'
  @array1 = qw(44 44 44 44);
  @array2 = qw(55 55 55 55 55 55 56);
  
  do {
    %_ = ();
    @_{@$_} = ();
    say "@$_ -> ", keys %_ > 1 ? "KO" : "OK"
      } for \@array1, \@array2
    '

Last edited by radoulov; 01-03-2011 at 03:16 PM.. Reason: Corrected!
This User Gave Thanks to radoulov For This Post:
ahmed_zaher
# 3  
Old 01-03-2011
Thanks for your reply.

I am beginner in perl, but do you confirm that this code is written in perl?
I got many error when I execute it.

Please advise,
Ahmed
# 4  
Old 01-03-2011
The code is written in Perl, but it uses a features of version 5.10.

Put this code in a script and try it:

Code:
#! /usr/bin/perl 

use warnings;
use strict;

my @array1 = qw(44 44 44 44);
my @array2 = qw(55 55 55 55 55 55 56);

do {
    %_ = ();
    @_{@$_} = ();
    print "@$_ -> ", keys %_ > 1 ? "KO" : "OK", "\n"
      } for \@array1, \@array2;

---------- Post updated at 05:17 PM ---------- Previous update was at 05:13 PM ----------
Last edited by radoulov; 01-03-2011 at 03:17 PM.. Reason: Corrected!
This User Gave Thanks to radoulov For This Post:
ahmed_zaher
# 5  
Old 01-03-2011
Many thanks for swift response.

It works without errors, but where should I put the actions if all elements have the same value?
and if they don't?

Also I tried to change the value of one element of the array to be different values but I got the same output !!!!!!

Actually, I have one array and I want to assure that all elements in the array have the same value regardless the length of it, then take a specific action.

Appreciate you reply and thank you again,
Ahmed
# 6  
Old 01-03-2011
Quote:
Also I tried to change the value of one element of the array to be different values but I got the same output !!!!!!
Could you post an example? I mean, the exact code you run.

This is supposed to be a readable version:
Code:
use warnings;
use strict;

my @arrys = (
  [ qw( 44 44 44 44 ) ],
  [ qw( 55 55 55 55 55 55 56 ) ],
  );

my %h;  
  
for my $arry (@arrys) {
  $h{$_} = undef for @$arry;
  if (keys %h > 1) {
    print "@$arry is not OK\n"
    }
  else {
    print "@$arry is OK\n";
    }  
  }

This User Gave Thanks to radoulov For This Post:
ahmed_zaher
# 7  
Old 01-03-2011
Thanks again,

I still have the same output after changing the last element of 2nd array from "56" to "55" to make all have the same value but unfortunatly i got the same output:

Code:
C:\Users\Administrator>perl c:\test.pl
44 44 44 44 is OK
55 55 55 55 55 55 56 is not OK
 
C:\Users\Administrator>perl c:\test.pl
44 44 44 44 is OK
55 55 55 55 55 55 55 is not OK
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