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AppGameKit Classic Chat / "and" in an "if" behaviour

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Riusz
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Posted: 20th Oct 2016 20:45
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Hello Everyone,

When I compare AppGameKit Tier 1 with other langages like c, c++, c#, java... when we have many conditions with an "and" operator, the conditions are evaluate in order and if one condition is false the other ones are not evaluated but not in AppGameKit Tier 1.
All conditions are evaluated with "and" even if the first is false :



if I want this kind of condition, I need two ifs :



Do you think this behaviour is wanted or it's a issue ?

Thanks
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BatVink
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Posted: 20th Oct 2016 22:12
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The functionality you are referring to is "&&", or "AndAlso".
We don't have that in Tier 1, we only have the equivalent of "&" or "And". You have to use your second method.
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blink0k
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Posted: 20th Oct 2016 23:00
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The fact that it ALWAYS resolves all conditions in an if statement is unique to basic and defined as part of the basic language
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Riusz
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Posted: 21st Oct 2016 04:51
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Thanks you for your answers !!!
Now I know it's normal.
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BatVink
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Posted: 21st Oct 2016 08:25
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Quote: "The fact that it ALWAYS resolves all conditions in an if statement is unique to basic and defined as part of the basic language"


It is also available in other languages (e.g C#), but it is rarely used. In most usage cases you will see &&, but & is also valid and checks all conditions. If you have a scenario where you can predict that both statements are generally true, you should use &, which is faster.
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Scary Little Rabbit
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Posted: 21st Oct 2016 11:03
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BatVink wrote: "The functionality you are referring to is "&&", or "AndAlso"."

also it's known as short-circuit evaluation. I'd like to see this implemented in AGK.
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blink0k
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Posted: 22nd Oct 2016 03:09
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Isn't & the binary "and" operator
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BatVink
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Posted: 23rd Oct 2016 10:37
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Yes, but it also works as a non-short-circuited test.
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nz0
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Posted: 24th Oct 2016 22:32 Edited at: 24th Oct 2016 22:34
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I haven't tried it, but shouldn't the parenthesis be prioritised to evaluate?



[edit] oh sorry. Noticed it's about the short circuiting..
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