脚本宝典收集整理的这篇文章主要介绍了js实例教程-js设计模式之BehavioralPatterns之Iterator，脚本宝典觉得挺不错的，现在分享给大家，也给大家做个参考。

 class KingSuccession {     constructor(inLineForThrone){         this.inLineForThrone = inLineForThrone;         this.pointer = 0;     }     next(){         return this.inLineForThrone[this.pointer++];     } } VAR kin = new KingSuccession(["Robert Baratheon","JofferyBaratheon","TommenBaratheon"]); kin.next(); kin.next(); kin.next();

 class FibonacciIterator{     constructor(){         this.previous = 1;         this.beforePRevious = 1;     }     next(){         var current = this.previous + this.beforePrevious;         this.beforePrevious = this.previous;         this.previous = current;         return current;     } } var fib = new FibonacciIterator(); fib.next(); fib.next(); fib.next();

 function* FibonacciGenerator () {     var previous = 1;     var beforePrevious = 1;     while (true){         var current = previous + beforePrevious;         beforePrevious = previous;         previous = current;         yield  current;     } } var fibo = new FibonacciGenerator(); fibo.next().value; fibo.next().value; fibo.next().value;

 class KingSuccession {     constructor(inLineForThrone){         this.inLineForThrone = inLineForThrone;         this.pointer = 0;     }     next(){         return this.inLineForThrone[this.pointer++];     } } var kin = new KingSuccession(["Robert Baratheon","JofferyBaratheon","TommenBaratheon"]); kin.next(); kin.next(); kin.next();

An interesting application of iterators is to not iterate over a fixed collection. For
instance an iterator can be used to generate sequential members of an infinite set
like the fibonacci sequence:

 class FibonacciIterator{     constructor(){         this.previous = 1;         this.beforePrevious = 1;     }     next(){         var current = this.previous + this.beforePrevious;         this.beforePrevious = this.previous;         this.previous = current;         return current;     } } var fib = new FibonacciIterator(); fib.next(); fib.next(); fib.next();

Iterators are a syntactic nicety that has long been missing from JavaScript. Another
great feature of ecmascript-2015 are generators. This is, in effect, a built in iterator
factory. Our fibonacci sequence could be rewritten like the following:

 function* FibonacciGenerator () {     var previous = 1;     var beforePrevious = 1;     while (true){         var current = previous + beforePrevious;         beforePrevious = previous;         previous = current;         yield  current;     } } var fibo = new FibonacciGenerator(); fibo.next().value; fibo.next().value; fibo.next().value;

觉得可用，就经常来吧！Javascript技巧 脚本宝典 欢迎评论哦！ js技巧，巧夺天工，精雕玉琢。小宝典献丑了！

脚本宝典总结

以上是脚本宝典为你收集整理的js实例教程-js设计模式之BehavioralPatterns之Iterator全部内容，希望文章能够帮你解决js实例教程-js设计模式之BehavioralPatterns之Iterator所遇到的问题。

如果觉得脚本宝典网站内容还不错，欢迎将脚本宝典推荐好友。

本图文内容来源于网友网络收集整理提供，作为学习参考使用，版权属于原作者。
如您有任何意见或建议可联系处理。小编QQ：384754419，请注明来意。