TypeScript 函数箭头表达式返回对象
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TypeScript function arrow expression returning object
提问by Dace Zarina
I have such case:
我有这样的情况：
interface MoverShaker {
getStatus(): { speed: number; frequency: number; };
}
function GetMoverShaker() : MoverShaker {
return {
getStatus: () => { speed: 2, frequency: 3 }
}
}
I am getting such error: The name 'frequency' does not exist in the current scope. Is such construction possible in TypeScript? If I am using such construction then everything is ok:
我收到这样的错误：当前范围中不存在名称“频率”。这样的构造在 TypeScript 中可行吗？如果我使用这样的结构，那么一切都很好：
function GetMoverShaker(): MoverShaker {
return {
getStatus: () => {
return { speed: 2, frequency: 3 }
}
}
回答by Roger Johansson
You can add parens:
您可以添加括号：
() => ({x:1,y:2})
This makes the parser understand that the { is not the beginning of a code block.
这使解析器明白 { 不是代码块的开始。
