Typescript conversion to boolean
typescript
Solution
You can use double exclamation sign trick which Typescript does allow and which works fine in JavaScript:
foo(!!xxx);
Alternatively, cast it to `any`
foo(<any>xxx);
Problem
In Typescript I can do this: ``` var xxx : some_type; if (xxx) foo(); else bar(); ``` Here xxx will be treated as a boolean, regardless of its type. I would like to do the same thing in a function argument. I have this function: ``` function foo(b : boolean) { ... } ``` I want to be able to call `foo(xxx)` and have xxx treated as a boolean, regardless of its type. But Typescript won't allow that. I tried this: ``` foo(<boolean>xxx); ``` but that Typescript won't allow that either. I can do this: ``` foo(xxx ? true : false); ``` But that seems a bit silly. Is there a better way to do it?