- shift ARRAY
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- shift
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Shifts the first value of the array off and returns it, shortening the array by 1 and
moving everything down. If there are no elements in the array, returns the undefined
value. If ARRAY is omitted, shifts the @_ array within the lexical scope of
subroutines and formats, and the @ARGV array at file scopes or within the
lexical scopes established by the eval '', BEGIN {}, INIT
{}, CHECK {}, and END {} constructs.
See also unshift, push, and pop. shift
and unshift do the same thing to the left end of an array that pop
and push do to the right end.
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