在JavaScript中使用声明hashmap

<String,Integer>

var arr = [];
arr[\'person\'] = \'John Smith\';

alert(arr.length); // returns 0, not an array anymore;

var arr = [];
arr[0] = \'John Smith\';

alert(arr.length); // returns 1, still an array;

var arr

var map = new Object();

map[\'person\'] = [];
map[\'person\'][\'test\'] = \'myvalue\';
map[\'person\'][\'test2\'] = \'myvalue2\';

alert(map[\'person\'][\'test\']);