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empty - not empty() [message #176291]

Mon, 19 December 2011 15:09

bill
Messages: 310
Registered: October 2010

Karma:

Senior Member

searching the manual gives lots of hits, none of which appear
relevant (at least by the title).

I had the following code in a scheduling class:

if ($ptNum == "empty") {
$ptNum = 0;
$status= "e";
}

I pass the string "empty" to the function as a patient number if
we are creating an empty appointment slot.

now, this fails because with a patient number of 0 the if returns
true.

I am aware of the function empty() that would work like that, but
do not understand why the compare fails with the constant, "empty."

I fixed the function by making it a strict compare, but would
like to know why the regular compare is true with the numeric
value of zero.

bill

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[Message index]

		empty - not empty() By: bill on Mon, 19 December 2011 15:09
		Re: empty - not empty() By: J.O. Aho on Mon, 19 December 2011 17:48
		Re: empty - not empty() By: Chuck Anderson on Tue, 20 December 2011 01:14
		Re: empty - not empty() By: bill on Tue, 20 December 2011 13:14
		Re: empty - not empty() By: M. Strobel on Tue, 20 December 2011 16:40
		Re: empty - not empty() By: bill on Tue, 20 December 2011 23:44

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