Typescript 布尔函数必须返回一个值
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Typescript boolean function must return a value
提问by redux17
I have following Typescript boolean function:
我有以下 Typescript 布尔函数：
checkRiskValues(): boolean {
this.controlsName.forEach((item) => {
this.threatForm.get(item)!.valueChanges.subscribe(value => {
this.valueControlArray.push(this.threatForm.get(item)!.value);
if (this.valueControlArray.indexOf(true) > -1)
return true;
else
return false
});
});
}
The method appears error the function must return value. I know it, but I'm not sure how to implement this true/false statement outside foreach scope ?
该方法出现错误函数必须返回值。我知道，但我不确定如何在 foreach 范围之外实现这个 true/false 语句？
If I call if/else statament outside foreach loop result is always false because
如果我在 foreach 循环之外调用 if/else statament 结果总是假的，因为
if (this.valueControlArray.indexOf(true) > -1)
is empty..
是空的..
EDIT
编辑
I've deleted checkRiskValues() function and add complete logic in ngOnInit() method and I'have also added valueControl varibable that keep true/false value and pass in another function. Thanks everyone..This my solution:
我已经删除了 checkRiskValues() 函数并在 ngOnInit() 方法中添加了完整的逻辑，并且我还添加了 valueControl 变量以保持真/假值并传入另一个函数。谢谢大家..这是我的解决方案：
ngOnInit() {
this.controlsName.forEach((item) => {
this.threatForm.get(item)!.valueChanges.subscribe(value => {
this.valueControlArray.push(this.threatForm.get(item)!.value);
if (this.valueControlArray.indexOf(true) > -1) {
this.valueControl = true;
}
else {
this.valueControl = false;
}
});
});
}
回答by axl-code
This is my proposal:
这是我的提议：
checkRiskValues(): boolean {
return setRiskValues().indexOf(true) > -1;
}
setRiskValues(): Array<any> {
let values = [];
this.controlsName.forEach((item) => {
this.threatForm.get(item)!.valueChanges.subscribe(value => {
values.push(this.threatForm.get(item)!.value);
});
});
return values;
}
This way you are:
这样你是：
- Building your array
- Checking if exists a positive value (if true is present will return the index)
- 构建你的阵列
- 检查是否存在正值（如果存在则返回索引）
