} class Container { constructor(list) { this.list = list; } // 生成遍历器 getIterator() { return new Iterator(this); } } let arr = [1, 2, 3, 4, 5, 6]; let container = new Container(arr); let iterator = container.getIterator() while(iterator.hasNext()){ console.log(iterator...
/***迭代器*/classIterator{constructor(arr){this.list=arr;this.index=0}next(){if(this.hasNext()){returnthis.list[this.index++]}returnnull}hasNext(){if(this.index>=this.list.length){returnfalse}returntrue}}constiterator=newIterator([1,2,3,'a','b']);while(iterator.hasNext()){console....
* 外部迭代器的实现 */classIterator{constructor(obj){this.obj=obj;this.current=0;}next(){this.current+=1;}isDone(){returnthis.current>=this.obj.length;}getCurrentItem(){returnthis.obj[this.current];}} 现在改写compare函数: letcompareIsEqual=function(iterator1,iterator2){if(iterator1.length!
constructor() { this.items = []; } addItem(item) { this.items.push(item); } getIterator() { return new Iterator(this.items); } } // 定义迭代器对象 class Iterator { constructor(collection) { this.collection = collection; this.index = 0; } hasNext() { return this.index < this.col...
Class: IteratorIterator new Iterator()Iterator object. Contains a set of rows as result of parameters sent to the method that generated this object. Source:iterator.js, line 55 EventscloseCalled when the Iterator is closed Source: iterator.js, line 246 ...
要被for...of循环调用Iterator接口,就必须在Symbol.iterator的属性上部署属性遍历器生成方法。 classRangeIterator{constructor(start,stop){this.value=start;this.stop=stop;}[Symbol.iterator]{returnthis;}next(){letvalue=this.value;if(value<this.stop){this.value++;return{done:false,value:value};}return...
迭代器模式(特别是在ES这个语境下)描述了一个方案,即可以把有些结构称为“可迭代对象”,因为它们实现了正式的Iterable接口,而且可以通过迭代器Iterator消费。 可迭代对象是一种抽象的方法。基本上,可以把可迭代对象理解成数组或集合这样的集合类型的对象。它们包含的元素都是有限的,而且都具有无歧义的遍历顺序: ...
class myIterator{ constructor(arr){ this.arr = arr; this.index = 0; } next(){ //每次调用next,都将指针指向下一个对象 return this.index < this.arr.length ? {value:this.arr[this.index++],done:false} : {value:undefined,done:true} ...
ES6不仅在语法上有很大的改进,在代码的组织结构上也有重大升级,ES6中新增加了像Set、WeakSet、Map、WeakMap、ArrayBuffer、TypedArray和DataView等数组结构;原生的模块化解决了复用、依赖、冲突、代码组织混乱的问题,让开发复杂的前端项目变得更加容易;类(class)的加入使JavaScript面向对象更加易于理解。
class Counter { constructor(limit) { this.limit = limit; } [Symbol.iterator]() { let count = 1; const limit = this.limit; return { next() { if (count <= limit) { return { done: false, value: count++ }; } else { return { done: true, value: undefined }; } } }; } } ...