node . js util . types . is generatorobject()方法
原文:https://www . geesforgeks . org/node-js-util-types-is generatorobject-method/
util . types . IsGeneratorObject()方法是 util 模块的内置应用编程接口，主要是为了支持 Node.js 自身内部 API 的需求而设计的。 使用util . types . is generatorobject()方法检查给定值是否为生成器对象。
语法:
util.types.isGeneratorObject( value )
参数:该函数接受单个参数值，该值保存将为生成器对象检查的值。
返回值:如果传递的值是生成器对象，则返回布尔值，即真，否则返回假。
下面的程序说明了 Node.js 中的util . types . is generatorobject()方法:
例 1:
// Node.js program to demonstrate the
// util.types.isGeneratorObject() method
// Import the util module
const util = require('util');
// Creating a generator function
let GeneratorFunction =
Object.getPrototypeOf(function*(){}).constructor
let genFn = new GeneratorFunction();
// Checking the generator object
let genObj = genFn();
console.log(genObj);
isGenObj = util.types.isGeneratorObject(genObj);
console.log("Object is a generator object:", isGenObj);
// Checking a normal object
normalObj = {a: "1", b: "2"};
console.log(normalObj);
isGenObj = util.types.isGeneratorObject(normalObj);
console.log("Object is a generator object:", isGenObj);
输出:
Object [Generator] {}
Object is a generator object: true
{ a: '1', b: '2' }
Object is a generator object: false
例 2:
// Node.js program to demonstrate the
// util.types.isGeneratorObject() method
// Import the util module
const util = require('util');
// Creating a generator function
let genFn = function* generateNumber() {
let id = 0;
while (true)
yield id++;
};
// Checking the generator object
let genObj = genFn();
console.log(genObj);
isGenObj = util.types.isGeneratorObject(genObj);
console.log("Object is a generator object:", isGenObj);
// Checking a normal object
normalObj = {arg1: "1", arg2: "2"};
console.log(normalObj);
isGenObj = util.types.isGeneratorObject(normalObj);
console.log("Object is a generator object:", isGenObj);
输出:
Object [Generator] {}
Object is a generator object: true
{ arg1: '1', arg2: '2' }
Object is a generator object: false
参考:T2】https://nodejs . org/API/util . html # util _ util _ types _ isgenerator object _ value
版权属于：月萌API www.moonapi.com，转载请注明出处
