TypeScript细碎知识点：ts中interface可以给Function、Array、Class做声明吗

都可以

• 函数类型

  interface SearchFunc {
      (source: string, subString: string): boolean;
  }
  
  let mySearch: SearchFunc;
  
  mySearch = function (source: string, subString: string) {
      let result = source.search(subString);
      return result > -1;
  }

• 数组类型

  interface StringArray {
      [index: number]: string;
  }
  
  let myArray: StringArray;
  myArray = ["Bob", "Fred"];

• 类类型

  interface ClockInterface {
      currentTime: Date;
      setTime(d: Date);
  }
  
  class Clock implements ClockInterface {
      currentTime: Date;
      setTime(d: Date) {
          this.currentTime = d;
      }
      constructor(h: number, m: number) { }
  }