HTTP/2 200 server: nginx content-type: text/plain;charset=UTF-8 content-encoding: gzip content-security-policy: default-src 'self'; connect-src 'self' *.google-analytics.com; img-src 'self' data: www.google-analytics.com www.googletagmanager.com; script-src 'self' 'unsafe-inline' www.google-analytics.com www.googletagmanager.com; style-src 'self'; report-uri /csp-reports accept-ranges: bytes age: 0 date: Wed, 30 Jul 2025 20:10:28 GMT via: 1.1 varnish x-served-by: cache-bom-vanm7210036-BOM x-cache: MISS x-cache-hits: 0 x-timer: S1753906228.524161,VS0,VE885 vary: Accept-Encoding strict-transport-security: max-age=31557600 content-length: 574 =over =item shift ARRAY X =item shift Removes and returns the B element of an array. This shortens the array by one and moves everything down. my @arr = ('cat', 'dog'); my $item = shift(@arr); # 'cat' # @arr is now ('dog'); Returns C if the array is empty. B C may also return C if the first element in the array is C. my @arr = (undef, 'two', 'three'); my $item = shift(@arr); # undef If ARRAY is omitted, C operates on the C<@ARGV> array in the main program, and the C<@_> array in subroutines. C will operate on the C<@ARGV> array in C, C, C, C blocks. Starting with Perl 5.14, an experimental feature allowed C to take a scalar expression. This experiment has been deemed unsuccessful, and was removed as of Perl 5.24. See also L|/unshift ARRAY,LIST>, L|/push ARRAY,LIST>, and L|/pop ARRAY>. C and L|/unshift ARRAY,LIST> do the same thing to the left end of an array that L|/pop ARRAY> and L|/push ARRAY,LIST> do to the right end. =back