note 61558 added to function.array-flip

From: Date: Mon, 06 Feb 2006 22:42:15 +0000
Subject: note 61558 added to function.array-flip
Groups: php.notes 
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Further deriving on benles -> crescentfreshpot, I think the following restatement of array_invert() reads much easier and probably runs faster, too. It does yield the same results: function array_invert($arr) { $flipped = array(); foreach ( $arr as $k => $a ) { # put the value in the key, with a throw-away value. dups are inherently avoided, # though overwritten. not sure if prefixing with if ( !isset($flipped[$a][$k]) ) # would speed this up or slow it down. probably depends on quantity of dups. $flipped[$a][$k] = NULL; } foreach ( $flipped as $k => $fl ) { # now make the keys the values. $flipped[$k] = array_keys($fl); } return $flipped; } ---- Server IP: 64.71.164.2 Probable Submitter: 24.129.132.130 ---- Manual Page -- http://www.php.net/manual/en/function.array-flip.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+61558 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+61558&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+61558&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+61558&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+61558&report=yes&reason=useless Delete: non-english -- http://master.php.net/manage/user-notes.php?action=delete+61558&report=yes&reason=non-english Delete: already in docs -- http://master.php.net/manage/user-notes.php?action=delete+61558&report=yes&reason=already+in+docs Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+61558&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+61558&report=yes Search -- http://master.php.net/manage/user-notes.php

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