“数字”类型不能分配给“布尔”类型

Question

代码：- 1.部门：部门[]；

let sectionCount:number;
    sectionCount = +this.sections.find(x =>x.sections).sections;

错误。

 error TS2345: Argument of type '(this: void, x: Departments) => number' is not assignable to parameter of type '(value: Departments, index: number, obj: Departments[]) => boolean'.
  Type 'number' is not assignable to type 'boolean'.

Answer 1

如果您是根据错误Type 'number' is not assignable to type 'boolean'进行解释，则与sectionCount无关。

如错误所述，find（）方法必须返回布尔值而不是数字-

尝试类似-

sectionCount = this.sections.find(x => {
  return x.sections > 0;
}).sections;