note 89842 added to language.types.float

From: Date: Wed, 25 Mar 2009 18:06:47 +0000
Subject: note 89842 added to language.types.float
Groups: php.notes 
Request: Send a blank email to php-notes+get-152436@lists.php.net to get a copy of this message
I had trouble with comparing floats. Basicly, I was reading floats from a database, and comparing with other floats from a database, and ended up with (5.0 != 5.0) being true. Anyway, i made some simple functions which fix the problem: <?php function floatcmp($f1,$f2,$precision = 10) // are 2 floats equal { $e = pow(10,$precision); $i1 = intval($f1 * $e); $i2 = intval($f2 * $e); return ($i1 == $i2); } function floatgtr($big,$small,$precision = 10) // is one float bigger than another { $e = pow(10,$precision); $ibig = intval($big * $e); $ismall = intval($small * $e); return ($ibig > $ismall); } function floatgtre($big,$small,$precision = 10) // is on float bigger or equal to another { $e = pow(10,$precision); $ibig = intval($big * $e); $ismall = intval($small * $e); return ($ibig >= $ismall); } ?> ---- Server IP: 87.124.35.190 Probable Submitter: 86.30.9.29 ---- Manual Page -- http://www.php.net/manual/en/language.types.float.php Edit -- https://master.php.net/note/edit/89842 Del: integrated -- https://master.php.net/note/delete/89842/integrated Del: useless -- https://master.php.net/note/delete/89842/useless Del: bad code -- https://master.php.net/note/delete/89842/bad+code Del: spam -- https://master.php.net/note/delete/89842/spam Del: non-english -- https://master.php.net/note/delete/89842/non-english Del: in docs -- https://master.php.net/note/delete/89842/in+docs Del: other reasons-- https://master.php.net/note/delete/89842 Reject -- https://master.php.net/note/reject/89842 Search -- https://master.php.net/manage/user-notes.php

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