str.indexOf("@")); //20,获取@符号的位置
console.log(str.substring(str.length,str.length-1)); //@,截取最后一位数...function count() {
var str = 'asdfssaaasasasasaa',json = {};
for (var i = 0; i < str.length;...iMax = 0;
var iIndex = '';
for (var i in json) {
if (json[i] > iMax) {...arr=[1,3,2,3,3,4,4,5,5,6,1,9,3,25,4];
function deRepeat(){
var newArr=[];
var obj={};...newArr2= new deRepeat(arr);
alert(newArr2); //输出1,2,3,4,5,6,9,25*/
5、截取字符串。