perl map ?

[donny750]

hello,

I've read the perl doc for the function map but i've not good understood;

Somebody can explain me with an example , please ?

Thnaks for your help

 

[stevexff]

It's just like a condensed foreach loop. if you cut and paste the following two examples, you'll see they do the same thing.

#!/usr/bin/perl

use strict;
use warnings;

my @array = qw(A b C D e);

my @mapped = map {lc} @array;

print join("\n", @mapped);

is just another way of writing

#!/usr/bin/perl

use strict;
use warnings;

my @array = qw(A b C D e);

my @mapped;

foreach (@array) {
   push @mapped, lc($_);
}

print join("\n", @mapped);

Does this help?

Steve

[small]"Every program can be reduced by one instruction, and every program has at least one bug. Therefore, any program can be reduced to one instruction which doesn't work." (Object:erlDesignPatterns)[/small]

 

[donny750]

yes thanks,
i understand