If Evaluates All? Even if first condition fails?

HCL Domino Domino Forum
1

i have done some testing, and it appears that a conditional like:

if false and true and false

would evaluate all, even if at the first false it should return “false”.

Why is this?

2

Subject: If Evaluates All? Even if first condition fails?

can you post the actual code logic

3

Subject: RE: If Evaluates All? Even if first condition fails?

If (Not (auxdoc Is Nothing)) And (auxdoc.XX(0) = XX) And (auxdoc.YY(0) = YY) And (auxdoc.GetFirstItem(“ZZ”).DateTimeValue.LsLocaltime = cdoc.GetFirstItem(“ZZ”).DateTimeValue.LsLocaltime) Thenend if

it would return an error saying that auxdoc is nothing, instead of stoping aht the “(not (auxdoc is nothing))” evaluation (false).

4

Subject: RE: If Evaluates All? Even if first condition fails?

Try nesting.

If Not auxdoc Is Nothing Then ’ means auxdoc is a document

If (auxdoc.XX(0) = XX) And (auxdoc.YY(0) = YY) And (auxdoc.GetFirstItem(“ZZ”).DateTimeValue.LsLocaltime = cdoc.GetFirstItem(“ZZ”).DateTimeValue.LsLocaltime) Then

’ some code you want to execute goes in here

End If

End If

Shawn

5

Subject: RE: If Evaluates All? Even if first condition fails?

that is how i fixed it, but i shouldn’t.

Notes should stop after the first (Not (auxdoc Is Nothing)).

6

Subject: RE: If Evaluates All? Even if first condition fails?

It all depends on the compiler. The LS compiler probably isn’t sophisticated enough to isolate that code in a way that it can recognize it as an atomic execute-me-first insruction.

7

Subject: RE: If Evaluates All? Even if first condition fails?

It is defined as not supporting truncated conditionals. Some compilers/languages use truncated conditions (e.g., Java and C++), while others do not. It isn’t an error, as such, although I agree that I wish they were supported, as the nesting is annoying.

8

Subject: LS evaluates whole expression…

…while java stops at the first unsatisfied constraint.Use nesting as suggested.