<?php // Only run if array_is_list() isn't available. if ( ! function_exists( 'array_is_list' ) ) { function array_is_list( array $arr ) { $i = 0; foreach ( $arr as $k => $v ) { if ( $k !== $i++ ) { return false; } } return true; } for ( $i = 0; $i < 100000; ++$i ) { array_is_list( array() ); } }
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