js 类型转换

1，字符串转数组
var s = ‘1234567’;
s.split(”);
=>[“1”, “2”, “3”, “4”, “5”, “6”, “7”];
2，数组转字符串
var arr =[“1”, “2”, “3”, “4”, “5”, “6”, “7”];
arr.join(”);
=> “1234567”
3，数组转json对象
var arr =[“1”, “2”, “3”, “4”, “5”, “6”, “7”];
var obj ={};
for(var i in arr){ obj[i] = arr[i] }；
4，json对象转数组
var obj ={“0″:”a”,”1″:”b”,”2″:”c”};
JSON.stringify(json);
5，对象合并
var obj ={“0″:”a”,”1″:”b”,”2″:”c”};
var obj1 ={“a”:”a”,”b”:”b”,”c”:”c”};
$.extend(obj ,obj1 );
6，数组合并
var arr =[“1”, “2”, “3”, “4”, “5”, “6”, “7”];
var arr1 =[“1”, “a”, “b”, “c”, “d”, “e”, “f”];