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本文執行個體講述了JavaScript實現Iterator模式的方法。分享給大家供大家參考。具體分析如下：
經常在網上看到有不少JS設計模式的樣本。這裡寫一下JavaScript實現Iterator模式的方法，記錄在此，僅作備忘：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta content="text/html; charset=utf-8" http-equiv="Content-Type" /><title>無標題 1</title></head><body><script type="text/javascript" language="javascript"> ///@定義一個迭代器對象 function Iterator(arr) { this.obj=arr; this.length=this.obj.length; this.index=0; //從前往後 } Iterator.prototype= { current:function() { return this.obj[this.index-1]; }, first:function() { return this.obj[0]; }, last:function() { return this.obj[this.length-1]; }, hasNext:function() { this.index=this.index+1; if(this.index>this.length || null==this.obj[this.index-1]) return false; return true; } } Array.prototype.createIterator=function() { return new Iterator(this); } var test=['abc1','abc2','abc3']; var iter=test.createIterator(); while(iter.hasNext()) { var tempArr=iter.current(); alert(tempArr); }</script></body></html>
希望本文所述對大家的javascript程式設計有所協助。
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