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push adds elements at end of a list (array). For example,
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push(@stack, $new); # equivalent to @stack = (@stack, $new);
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One can also use a list as the second arg in push:
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push(@stack, 6, "next", @anotherlist);
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pop, the inverse operator to push, removes and returns the last element in the list
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Note chop(@stack) removes last character of each entry of @stack
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unshift is similar to push, except it works on left (lowest indices) of list. For example,
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unshift(@INC, $dir);
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modifies the path for included files on-the-fly
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shift is to pop as unshift is to push
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reverse(@list) and sort(@list) leave @list unaltered, but returns reversed and sorted lists, respectively
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