typescript Angular2 错误：类型“数字”不可分配给类型“数字构造函数”
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Angular2 Error: Type 'number' is not assignable to type 'NumberConstructor'
提问by anonym
In the following Angular2 program where I want the system to randomly choose four choices from either 0 or 1. I'm getting the desired output and the console doesn't report any error. However, my IDE displays the following error:
在下面的 Angular2 程序中，我希望系统从 0 或 1 中随机选择四个选项。我得到了所需的输出并且控制台没有报告任何错误。但是，我的 IDE 显示以下错误：
I tried changing Numberto numberbut it yields another error:
我尝试更改Number为，number但它产生了另一个错误：
Component Code
组件代码
import {Component} from 'angular2/core';
import {OnInit} from 'angular2/core';
@Component(
{
selector: 'puzzle',
template: `
<section class="combination">
I: {{ switch1Number }}<br>
II: {{ switch2Number }}<br>
III: {{ switch3Number }}<br>
IV: {{ switch4Number }}
</section>
`
})
export class PuzzleComponent implements OnInit {
switch1Number = Number;
switch2Number = Number;
switch3Number = Number;
switch4Number = Number;
ngOnInit() {
// Math.randon gives a random decimal value between 0 & 1.
// Math..round rounds it to 0 or 1
this.switch1Number = Math.round(Math.random());
this.switch2Number = Math.round(Math.random());
this.switch3Number = Math.round(Math.random());
this.switch4Number = Math.round(Math.random());
console.log(this.switch1Number, this.switch2Number, this.switch3Number, this.switch4Number);
}
}
采纳答案by Ankit Singh
Replace Numberwith numberin
更换Number用number的
switch1Number = Number
it should be
它应该是
switch1Number: number;
Numberis not a type of variable, it's a number constructorjust likeStringis a stringtype constructor.
Number不是一种类型的变量，它是一个数字constructor，就像String是一种string类型constructor。
