Question

这是我们通过索引获取数组的方式：

var theArray=[];
theArray['something']=="Hello!";
console.log(theArray['something']); //Print "Hello!"

现在想象同样的事情，我有一个功能，我打算称之为;像这样：

export class myClass {
    public callByIndex(theIndex:string) {
        //this is how it works:
        this.doSomething()

        //And these are the ways I need to call them:
        this.theIndex //of course error!
        //or
        this[theIndex]; //Another Error! How to do it?
    }

    private doSomething (){
        console.log("Yesss, I called!");
    }
}

let callTest = new myClass();
callTest.callByIndex("doSomething"); //Here I give the method name!

怎么可能？

Answer 1

首先，Javascript中的数组只是具有整数属性的普通对象（{ }）。因此，要使用方括号调用函数，只需将要执行的函数的名称传递给它

class Test {
  dummyFunction(arg) {
    console.log('dummyFunction called with argument: ' + arg);
  }
}

let test = new Test();
test['dummyFunction']('this is a string');

是否可以像数组索引一样调用TypeScript方法？

1 个答案: