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Perl/Basics/Variables and Data Types/Helper Functions/Unshift

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The unshift() function is like the inverse of the push() function and treats the array like a stack. In stead of pushing to the top of the stack, this function operates against the bottom of the stack.

my @array;
$array[0] = 1;
unshift(@array,0); # $array[0] now contains "0" and $array[1] now contains [1].