TypeScript-泛型

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TypeScript泛型

泛型变量

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function loggingIdentity<T>(arg: Array<T>): Array<T> {
    console.log(arg.length);
    return arg;
}

泛型接口

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interface GenericIdentityFn<T> {
    (arg: T): T;
}

function identity<T>(arg: T): T {
    return arg;
}

let myIdentity: GenericIdentityFn<number> = identity;

泛型类

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class GenericNumber<T> {
    zeroValue: T;
    add: (x: T, y: T) => T;
}

let myGenericNumber = new GenericNumber<number>();
myGenericNumber.zeroValue = 0;
myGenericNumber.add = function(x, y) { return x + y; };
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