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ts重点学习56-_this的使用笔记

眼君 2023-02-13 阅读 106


export default {}

let userInfo = {
name: "邱淑贞",
age: 18,
song: "恨你太无情",
marry: true,
show: function() {
this.marry = false;
}
}

class Rectangle1 {
w: number;
h: number;

constructor(w: number, h: number) {
this.w = w;
this.h = h;
}

getArea() {
return () => {
return this.w * this.h;
}
}
}

class Rectangle2 {
w: number;
h: number;

constructor(w: number, h: number) {
this.w = w;
this.h = h;
}

getArea(this: Rectangle2) {
return () => {
return this.w * this.h;
}
}
}


class Rectangle3 {
w: number;
h: number;

constructor(w: number, h: number) {
this.w = w;
this.h = h;
}

getArea(this: void) {
return () => {
return 111;
}
}
}

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