检查是否函数
https://github.com/ddzy/ts-utility-plugins/tree/master/src/ddzy/utility/function/isFunction
isFunction.test.tsimport { isFunction } from "../../utility/function/isFunction";describe('isFunction', () => {test('isFunction should return `true` when received a function object', () => {const origin = [function () { },Symbol,];for (const v of origin) {expect(isFunction(v)).toBeTruthy();}});});