Array 之 join() input()

qingfeng825 · 发表于 2013-2-5 01:30:18

<html><head><script language="javascript">//For an array created by a regular expression matchfunction testArrayFromEl(){ var myRe=/d(b+)(d)/i; var myArray=myRe.exec("cdbBBBdbsdbBBBBdbz"); alert("input="+myArray.input); //结果：cdbBdbsdbBBBBdbz alert("index="+myArray.index);//结果：1 表示第一个匹配的位置 alert("[0]="+myArray[0]);//结果:dbBBBd 匹配整个字符的第一个字符串 alert("[1]="+myArray[1]);//结果:bBBB 匹配正则表达式中第一个括号的字符串 alert("[2]="+myArray[2]);//结果:d 匹配正则表达式中第二个括号的字符串 alert("length"+myArray.length); // 结果： 3}//concat():连接两个数组，返回一个新的数组,不改变原数组的内容 function testConcat(){ alpha=new Array("a","b","c")numeric=new Array(1,2,3)alphaNumeric=alpha.concat(numeric) } //join:The string conversions of all array elements are joined into one string. function testJoin(){ a = new Array("Wind","Rain","Fire")myVar1=a.join() // assigns "Wind,Rain,Fire" to myVar1myVar2=a.join(", ") // assigns "Wind, Rain, Fire" to myVar1myVar3=a.join(" + ") // assigns "Wind + Rain + Fire" to myVar1 alert(myVar1+"----"+myVar2+"----"+myVar3)} </script></head></html>

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