Ternary operator clarification ($1 = 0) ? ($b = 0) : ($b = 1)

[DatMCEyeBall]

AutoIt is known by its lazy evaluation strategy, so no that's never the case. You misunderstood me if you assume something like that.

?

[trancexx]

It means you won't see messagebox in this example:

$x = 0 And MsgBox(0, "", "Google next time first")

ConsoleWrite($x & @CRLF)

But you will see it here:

$x = 1 And MsgBox(0, "", "Google next time first")

ConsoleWrite($x & @CRLF)

[DatMCEyeBall]

That's not "lazy", at least I don't think it's "lazy".

$x = 0 evaluates to false, and since in an And statement all the expressions need to be true, it skips over and continues.

[Richard Robertson]

You're the one who claimed that "$a" would be evaluated twice in your example.

[trancexx]

Aha, I see your point now. Only your cache remark doesn't make sense because $a should be evaluated twice when expression is written like that - by definition.

[Richard Robertson]

I intended it to be more of a: cache your results and don't call functions repeatedly for the same result.

[trancexx]

But it's not possible to know the result in advance. Not even for simple (non-const) variable. For other more usual cases:

$x = a() ? a() : 2

Func a()
    Return Random(0, 1000)
EndFunc

You would cahce the return value of function "a" there? Edited January 11, 2014 by trancexx

[DatMCEyeBall]

$y = a()
$x = $y ? $y : 2

Func a()
    Return Random(0, 1000)
EndFunc

[Richard Robertson]

But it's not possible to know the result in advance. Not even for simple (non-const) variable. For other more usual cases:

You would cahce the return value of function "a" there?

$y = a()
$x = $y ? $y : 2

Func a()
    Return Random(0, 1000)
EndFunc

^ This

This is a situation where you should cache your results in any programming language and situation.

Edited January 12, 2014 by Richard Robertson

[trancexx]

I think you're just pulling my leg.