摘要：
1，for循环：vararr=newArray(13.5,3,4,5,6);for(vari=0;i˂arr.length;i++){arr[i]=arr[i]/2.0;}2，for,in循环：varxvarmycars=newArray()mycars[0]="Saab"mycars[1]="Volvo"mycars[2]="BMW"for(xinmycars){document.write(m
1，for循环：
var arr = new Array(13.5,3,4,5,6);
for(var i=0;i<arr.length;i++){
arr[i] = arr[i]/2.0;
}
2，for,in循环：
var x
var mycars = new Array()
mycars[0] = "Saab"
mycars[1] = "Volvo"
mycars[2] = "BMW"
for (x in mycars)
{
document.write(mycars[x] + "<br />")
}
2.1for,in 循环遍历对象
var data = {1: "食品标准物质", 2: "环境标准物质", 3: "职业卫生标准物质", 4: "仪器鉴定标准物质", 5: "药典及对照品", 6: "进口标准品", 7: "地质矿产标准物质", 8: "其他标准物质", 9: "化学试剂"};for(var i in data){
console.log(i);//索引
console.log(data[i]);//值
}
3，each遍历一维数组：
var arr=new Array();
arr=["aaa","bbb","ccc"];
$.each(arr,function(index,value){
alert(i+"..."+value);
});
3.1each遍历对象：
var data = {1: "食品标准物质", 2: "环境标准物质", 3: "职业卫生标准物质", 4: "仪器鉴定标准物质", 5: "药典及对照品", 6: "进口标准品", 7: "地质矿产标准物质", 8: "其他标准物质", 9: "化学试剂"};
$.each(data,function(i,n){
console.log('索引' + i + ';对应值为：' + n +';');
});
4，each遍历二维数组：
$(function () {
$.each([["aaa", "bbb", "ccc"], ["ddd", "eee", "fff"], ["ggg", "hhh", "iii"]], function (index, item) {
alert(index + "..." + item);
//输出0...aaa,bbb,ccc 1...ddd,eee,fff 2...ggg,hhh,iii 这时的index为数组下标,item相当于取这二维数组中的每一个数组
$.each(item, function (index, itemobj) {
alert(index + "....." + itemobj);
});
});
//输出0...aaa,bbb,ccc 0...aaa 1...bbb 2...cccc 1...ddd,eee,fff 0...ddd 1...eee 2...fff 2...ggg,hhh,iii 0...ggg 1...hhh 2...iii
});