问题
I was wondering how could one declare a typed-function array in TypeScript.
For instance, say I have a field which can hold a function that has no arguments and returns void:
private func: () => void;
Now, say I wanted a field which can hold an array of such functions:
private funcs: () => void [];
This is obviously the wrong way to do what I intended since the compiler considers this to be a function which returns an array of voids.
Trying to isolate the inline prototype declaration with parentheses as in:
private funcs2: ( () => void ) [];
causes a compiler error.
Does anyone have an idea of how this could be accomplished ?
回答1:
You'll need to use the full type literal syntax instead of the => shorthand:
private funcs: { (): void; }[];
You could also make an interface if that looks too weird:
// (elsewhere at top-level)
interface foo {
(): void;
}
class etc {
private funcs: foo[];
}
来源：https://stackoverflow.com/questions/14662995/typescript-array-of-functions