typescript parameter function type

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Jona
17 Apr 2016
1class Foo {
2    save(callback: (n: number) => any) : void {
3        callback(42);
4    }
5}
6var foo = new Foo();
7
8var strCallback = (result: string) : void => {
9    alert(result);
10}
11var numCallback = (result: number) : void => {
12    alert(result.toString());
13}
14
15foo.save(strCallback); // not OK
16foo.save(numCallback); // OK
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