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Hi,

Please, before one shutdown the wonderful solution first given by aitap above on this issue,
Or wonder why "the" lovely map function doesn't do the "magic" as expected, Please, check the OP subroutine clean().

sub clean { chomp($_[0]); $_[0] =~ s/^\s+//g; $_[0] =~ s/\s+$//g; }
Why use chomp and then sepeartely, remove spaces? At the beginning and endling of each value?
I thought, \s+ also covers \n that chomp is suppose to remove?
I modified the OP clean subroutine and both map and grep gave the happy endling.
So, there is really no need for the extra $_ as perviously stated, if the modified subroutine is considered.
check below:
#!/usr/bin/perl use strict; use warnings; my $str = "item1 | item2| item3 |item4| "; my @cleaned1 = map { clean_modify($_) } split( /\|/, $str ); my @cleaned2 = grep { clean_modify($_) } split( /\|/, $str ); print join "\n", @cleaned1; print join "\n", @cleaned2; sub clean_modify { $_[0] =~ s/^\s+?|\s+?$//g; return $_[0]; } sub clean { ## don't use chomp( $_[0] ); $_[0] =~ s/^\s+//g; $_[0] =~ s/\s+$//g; }
OUTPUT
item1 item2 item3 item4 item1 item2 item3 item4

If you tell me, I'll forget.
If you show me, I'll remember.
if you involve me, I'll understand.
--- Author unknown to me

In reply to Re: How to call a function on each item after a split? by 2teez
in thread How to call a function on each item after a split? by MrSnrub

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