[ cf-dev ] CF "Feature"

[Matt Horn]

Something of interest one of our developers found :


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How do you think the following statement will be resolved:
<cfset var1 = "Yes">

<cfif var1 EQ 1>
true
<cfelse>
false
</cfif>
You would think that it would return false (I certainly did), instead it returns true!
Cold Fusion does a (not so) clever boolean conversion on the string "Yes"

Even if you attempt to cast the 1 as a string "1" in the if:
<cfif var1 EQ "1">
true
<cfelse>
false
</cfif>
Still true!

The only way to get around this is to do an extra check of IsNumeric():
<cfif IsNumeric(var1) AND var1 EQ 1>
true
<cfelse>
false
</cfif>
Then you get false (hurray!).
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Matt Horn
Senior Web Applications Developer
MediaTel Group
84-86 Regent Street
London
W1B 5AJ
Tel: +44(0)20 7439 7575
Fax: +44(0)20 7734 0940

www.MediaTelGroup.co.uk

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