Not, is a operator, but not is a function

[SP]

How can I simplify this code?
If a
a = 0
Else
a = 1
EndIf

In other languages is very easy (a = NOT a), but in PB not works.

Thanks in advance

[DarkDragon]

How can I simplify this code?
If a
a = 0
Else
a = 1
EndIf

In other languages is very easy (a = NOT a), but in PB not works.

Thanks in advance

Works here:

Code: Select all

a.l = 0
Debug (Not a) Or #False

a.l = 1
Debug (Not a) Or #False

[u9]

I guess you have to use parantheses like this:

Code: Select all

a = (Not a)

[SP]

Hi Daniel,

Easy and very clear!
Thanks

Greetings
Santi

[DarkDragon]

And this one works, too:

Code: Select all

a.l = 0
Debug (Not a)

a.l = 1
Debug (Not a)

But first one is more secure afaik, because purebasic doesn't know boolean expressions, it's more like a integer expression.

[SP]

OK Daniel and u9. This works!

Greetings!

[Trond]

This works here, but it is definetely not intentional:

Code: Select all

a.l = 0
a = _ Not a
Debug a

a.l = 1
a = _ Not a
Debug a

[PB]

> How can I simplify this code?

Code: Select all

a=1-a

[Trond]

> How can I simplify this code?

Code: Select all

a=1-a

Too much:

Code: Select all

; Original code
a = 5
If a 
  a = 0 
Else 
  a = 1 
EndIf
Debug a

; Your code
a = 5
a=1-a
Debug a

[PB]

@Trond: The original code by SP does not specify that a=5, and only shows
that he wants to toggle between 0 and 1, which is exactly what a=1-a does.

@SP: In PureBasic you'd do it like this:

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a=~a

Because PureBasic uses ~ instead of Not in your original post. Observe:

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Repeat
  a=~a
  Debug a
  c+1
Until c=4

[Trond]

@Trond: The original code by SP does not specify that a=5, and only shows
that he wants to toggle between 0 and 1, which is exactly what a=1-a does.

No, since the original post does not specify what a is you cannot assume that it is either 0 or 1. It could be -4562.

The code does not toggle between 0 and 1, it toggles between 0 and not 0. It says "if a", not "if a = 1".

I might as well post this:

Code: Select all

a=1

It's much simpler than everything else so far. Sure, it doesn't do what he asked for, but so what? Pick a random value for a and it gives the correct result almost every time.

[SP]

Hi Trond and PB,

Thanks for all your posts.
Really you are PB cracks!

All solutions are valid for me, because in this case, the initial value is always '0'.

Greetings

[Dr. Dri]

To toggle between 0 and 1 a!1 is easier but in his code it seems that "true" is not "1" but "non zero"

Dri

[PB]

> the original post does not specify what a is you cannot assume

True, but I was taking an educated guess based on the fact that no specific
info was provided that enabled us to be 100% sure of his intentions, especially
when you consider he gave an example of "a = Not a", so it's obvious that he
wanted a toggle of some sort, and his code referenced both 0 and 1, so I think
it was a very good assumption to make.

[Froggerprogger]

just 2 cents:
you might toggle a between any two values x and y by using:

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x = 1234
y = -17
toggle = y ! x

a = x
a ! toggle
a ! toggle
...

So e.g. between 42 and 24

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a = 24
toggle = 50 ; 42 ! 24

a ! toggle
a ! toggle
...