split an array

[dkin]

How can I split an array so I will get two new arrays. One will be based on the odd line numbers content and the other one for even line numbers

main array
1
2
3
4
5
6

new odd array
1
3
5

new even array
2
4
6

Thanks

 

[MakeItSo]

$j=0
$k=0
for ($i=0;$i<=@nums;$i++)
{
if (($i%2)!=0) #odd numbers
{
$odds[$j]=($nums[$i]); #array with odds
$j++
}
else #even nums
{
$evens[$k]=($nums[$i]);
$k++;
}
}
Might be buggy, I'm a beginner myself. ;-)
But should do it.

Andreas Galambos
EDP / Technical Support Specialist
(andreas.galambos@bowneglobal.de)
HP:

http://www.andygalambos.de

 

[CadGuyExtraordinaire]

I think dkin wants the values of the odd indexes in 1 and the even indexes in the other...not the odd values in one and even values in another...

If you want odd/even indexes, do this:

@list=qw(a b c d e f);
for($i=0;$i<=$#list;$i++) {
    if ($i/2==int($i/2)) {push(@evens,$list[$i])}
    else                 {push(@odds ,$list[$i])}
}

print &quot;odds  are : &quot; . (join &quot; &quot;,@odds)  . &quot;\n&quot;;
print &quot;evens are : &quot; . (join &quot; &quot;,@evens) . &quot;\n&quot;;

which would produce:

odds are : b d f
evens are : a c e

 

[MakeItSo]

D-Oh! got me, CadGuy.

 

[mikevh]

You could use grep.

#!perl
use strict;

my @a=(1..6);
my @odds=grep {$_ % 2} @a;
my @evens=grep {!($_ % 2)} @a;

print @odds, "\n", @evens;

Prints
135
246

 

[CadGuyExtraordinaire]

Well, that would put the odd *values* into one array and the even *values* into the other...not the indicies...

actually, looking closer at MakeItSo's code I see it's actually right..sorry about that!

 

[mikevh]

According to the example in the original post, it is the odd *values* that are wanted in the &quot;odds&quot; array and the even *values* that are wanted in the &quot;evens&quot; array. That's what my example does.

 

[CadGuyExtraordinaire]

&quot;odd line numbers content&quot; not the odd content...

 

[mikevh]

Instead of arguing, why don't we let dkin tell us, as the original poster? What do you say, dkin?
Do you want the odd *values* in one array and the even *values* in another array, or the elements with odd *indices* in one array and the elements with even *indices* in the other array? It's your question, so please tell us.