英文:
An if statement using an object hierachy in Typescript
问题
我尝试使用以下层次结构构建逻辑语句：
if ((config.elementConfig.curve[0].dataset[0].splitBy = '我的离散变量')) {.....
我收到了来自TypeScript的错误消息："错误 未预期的常量条件 no-constant-condition"。
我应该如何更改它，以使TypeScript接受它？
英文:
I am trying to base a logical statement using a hierachy like below
if ((config.elementConfig.curve[0].dataset[0].splitBy = 'my descrete var')) {.....
I get the error "error Unexpected constant condition no-constant-condition"
from typescript
how do I change it so typescript will like it
答案1
得分: 0
I suspect your issue is that you are trying to do a variable assignment, not an evaluation. You want to use ==, not =.
= is used to assign:
const myValue = "thing";
== is used to evaluate.
It's complaining that the expression you're giving it doesn't evaluate to something the if condition can check!
if (myValue === "thing") {
So you probably intend to have:
if ((config.elementConfig.curve[0].dataset[0].splitBy == 'my descrete var')
英文:
I suspect your issue is that you are trying to do a variable asignment, not an evaluation. You want to use ==, not =.
= is used to assign:
const myValue = "thing";
== is used to evaluate.
It's complaining that the expression you're giving it doesn't evaluate to something the if condition can check!
if (myValue === "thing") {
So you probably intend to have:
if ((config.elementConfig.curve[0].dataset[0].splitBy == 'my descrete var')
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