[RESOLVED] IIF Statement

Would you say these two produce the same result, all the time, when testing for booleans?

blnResult = (CDate(strDate) > Now)

blnResult = IIf(CDate(strDate) > Now, True, False)

I would say that they're functionally equivalent.

(CDate(strDate) > Now) will return True or False as will the IIf statement.

Perhaps the IIf statement is a little more obvious, to the reader, about what's being tested, but that's a matter of interpretation.

Just out of interest I timed the two. Executing a 1,000,000 of each resulted in the following times on my machine:

Code:

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    binResult = (CDate(strDate) > Now) - about 7,500 mS
    binResult = IIf(CDate(strDate) > Now, True, False) - about 8,300 mS

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Any particular reason you're asking?

Quote:

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Originally Posted by Doogle

I would say that they're functionally equivalent.

(CDate(strDate) > Now) will return True or False as will the IIf statement.

Perhaps the IIf statement is a little more obvious, to the reader, about what's being tested, but that's a matter of interpretation.

Just out of interest I timed the two. Executing a 1,000,000 of each resulted in the following times on my machine:

Code:

---

    binResult = (CDate(strDate) > Now) - about 7,500 mS
    binResult = IIf(CDate(strDate) > Now, True, False) - about 8,300 mS

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Any particular reason you're asking?

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IIF statement would obviously be slow because it is a function and would evaluate all its input parameters irrespective of it's type.

Besides this, the overhead of transfer of control from and to the function would also be significant in this situation as the first statement is just a simple mathematical comparison while the other one is a function call.

Pradeep

Thanks to both of you Doogle and PraDeep for answering my question!:cool:

Doogle, also thanks for taking it to another level and did that speed testing for me. No particular reason why I want to know but I just like to improve and improve on writing efficient code. That is all.