First of all the way you used map is wrong . There is some unbalanced brace also . It should be like the following, 
use strict;
use warnings;
my @foo = ('usa', 'cananda', 'strawberry');
@foo = map { "'$_'"} @foo;
print @foo;

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In reply to Re^2: map array elements with single quotes by karthigayan
in thread map array elements with single quotes by kalyanrajsista

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