js concat步骤

js concat方法
concat() 方法用于连接两个或多个数组。

该方法不会改变现有的数组，而仅仅会返回被连接数组的一个副本。

通过下面的例子很容易看明白：

<script language="JavaScript" type="text/javascript">
	var tempList = new Array();
	tempList[0] = "a";
	tempList[1] = "b";
	tempList[2] = "c";
	tempList[3] = "d";
	var tempList2 = new Array();
	tempList2[0] = "e";
	tempList2[1] = "f";
	tempList2[2] = "g";
	tempList2[3] = "h";
	var tempList3 = new Array();
	tempList3 = tempList.concat(tempList2);
	for(var i = 0; i < tempList.length; i++) {
		document.write("tempList:" + tempList[i] + "<br>");
	}
		for(var i = 0; i < tempList2.length; i++) {
		document.write("tempList2:" + tempList2[i] + "<br>");
	}
	for(var i = 0; i < tempList3.length; i++) {
		document.write("tempList3:" + tempList3[i] + "<br>");
	}
</script>

结果：
tempList:a
tempList:b
tempList:c
tempList:d
tempList2:e
tempList2:f
tempList2:g
tempList2:h
tempList3:a
tempList3:b
tempList3:c
tempList3:d
tempList3:e
tempList3:f
tempList3:g
tempList3:h