How to convert bool to Int?

[罗勇刚(Yonggang Luo)]

if that's not possible, suggest to add toInt() method to bool

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[Rhys Brett-Bowen]

int a = myBool ? 1 : 0;

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[罗勇刚(Yonggang Luo)]

That's the answer, but not the one I am looking for. It's a bit verbose, anyway, thanks for your answer.

I am looking for a simpler way, such as bool.toInt().

[Cogman]

int toInt(bool val) => val ? 1 : 0;

Throw this method in some utility class and then you can to int your bools in about the same speed as if they had added the functionality to the basic bool object.  

Usage:

toInt(true);

[Peter Ahé]

If you think this belongs in the class bool, you can file a feature request at http://dartbug.com/new.

Cheers,

Peter

[Matthew Butler]

I believe long ago there was discussion about this and in the opposite direction early on (pre-M1) of Dart. However there are a few problems with casting a bool to an int. For instance why arbitrarily '1' for true? Why not 500? Or -132001238 ?

Basically there are conventions that programmers (particularly from C/c-like languages) in which 1 == true and 0 == false, however other languages don't necessarily follow that same convention. Ruby for instance sees 0 as true (because it's not nil). Same for some other languages. Following that convention should true.toInt() return 1 and false.toInt() return null?

As mentioned by others, it would be best to implement your own method/function to provide the results you would expect in your own code.

:)

Matt

[Randal L. Schwartz]

>>>>> "Matthew" == Matthew Butler <butler....@gmail.com> writes:

Matthew> Basically there are conventions that programmers (particularly
Matthew> from C/c-like languages) in which 1 == true and 0 == false,
Matthew> however other languages don't necessarily follow that same
Matthew> convention. Ruby for instance sees 0 as true (because it's not
Matthew> nil). Same for some other languages. Following that convention
Matthew> should true.toInt() return 1 and false.toInt() return null?

I remember some sort of microcomputer BASIC returned 0 for false, and -1
for true, being an integer where all bits were 1.

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[罗勇刚(Yonggang Luo)]

For bool, its a bit, if its not null, then it's natural for 0 stand for false, 1 stand for true,  if you want the reverse result, use ! Operator.
For the possible of being null, cause toInt is a member function, if it's null, call to this will cause exception, so that s not a problem.  I think, sometimes, following the obvious way is the best way, no need to create inconvenience intentionly

[罗勇刚(Yonggang Luo)]

2014年5月8日 上午2:11于 "Matthew Butler" <butler....@gmail.com>写道：
>
> I believe long ago there was discussion about this and in the opposite direction early on (pre-M1) of Dart. However there are a few problems with casting a bool to an int. For instance why arbitrarily '1' for true? Why not 500? Or -132001238 ?
>

its not based on other language, but the nature of bool itself,  bool stand for two state (true , false). can be naturally represent as 1/0. Why not true=0, false=1, its basically because true=1 is more convention, reference to mathematical logic.