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# boolean operation

 P: n/a hi all, what is oposite of if (\$_periode == NULL || \$_periode == "") it is not if (\$_periode != NULL || \$_periode != "") kind regards Stijn Jul 17 '05 #1
4 Replies

 P: n/a i would say, if (\$_periode != NULL && \$_periode != "") Stijn Goris wrote: hi all, what is oposite of if (\$_periode == NULL || \$_periode == "") it is not if (\$_periode != NULL || \$_periode != "") kind regards Stijn Jul 17 '05 #2

 P: n/a On Wed, 22 Oct 2003 13:37:14 GMT, "Stijn Goris" wrote: hi all,what is oposite ofif (\$_periode == NULL || \$_periode == "")it is notif (\$_periode != NULL || \$_periode != "")kind regardsStijn if (\$_periode != NULL && \$_periode != "") Steve Jul 17 '05 #3

 P: n/a Hi, Stijn Goris wrote: what is oposite of if (\$_periode == NULL || \$_periode == "") it is not if (\$_periode != NULL || \$_periode != "") As other people have pointed out, you need to use && instead of || If you're confused as to why, check out "demorgan's rule": http://lc.brooklyn.cuny.edu/LeftBarF...ic/demorg.html Regards, Luke Jul 17 '05 #4

 P: n/a On 22-Oct-2003, "Stijn Goris" wrote: what is oposite of if (\$_periode == NULL || \$_periode == "") it is not if (\$_periode != NULL || \$_periode != "") as others have pointed out it should be if (\$_periode != NULL && \$_period != "") however you could also use if (!(\$_periode == NULL || \$_periode == "")) -- Tom Thackrey www.creative-light.com tom (at) creative (dash) light (dot) com do NOT send email to ja*********@willglen.net (it's reserved for spammers) Jul 17 '05 #5

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