If you want to match the string in the array end with same number of characters as the pattern.Then,you try this. 
my $search = "foo";

my $len=length($search); #finding the length of the pattern

my @array = ("s1 bar", "foo", "s3 foo");

print grep {/.*\b(.{$len})/;$_=$& if $1 eq $search;} @array;

#checking whether the end characters of the string in the 
array is same as the pattern given

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In reply to Re: grep regex exact match last n positions by nvivek
in thread grep regex exact match last n positions by coldy

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