- JScript code
[ {"id": 123, "type": "1"}, {"id": 234, "type": "1"}, {"id": 345, "type": "2"}, {"id": 4646, "type": "2"}, {"id": 878, "type": "2"}, {"id": 78987, "type": "2"}, {"id": 4646, "type": "3"}, {"id": 4646, "type": "3"}, {"id": 4646, "type": "3"}, {"id": 4646, "type": "3"}, {"id": 4646, "type": "3"}, ]
例如 怎么计算type=2有多少个
还有个问题怎么现在每天回贴都没分了。。。。
------解决方案--------------------
var arr = [
{"id": 123, "type": "1"},
{"id": 234, "type": "1"},
{"id": 345, "type": "2"},
{"id": 4646, "type": "2"},
{"id": 878, "type": "2"},
{"id": 78987, "type": "2"},
{"id": 4646, "type": "3"},
{"id": 4646, "type": "3"},
{"id": 4646, "type": "3"},
{"id": 4646, "type": "3"},
{"id": 4646, "type": "3"},
];
var count = 0;
for(var i = 0 ; i < arr.length ; i ++)
{
if(arr[i].type == '2') count ++
}
alert(count)
------解决方案--------------------
- JScript code
var json = [ {"id": 123, "type": "1"}, {"id": 234, "type": "1"}, {"id": 345, "type": "2"}, {"id": 4646, "type": "2"}, {"id": 878, "type": "2"}, {"id": 78987, "type": "2"}, {"id": 4646, "type": "3"}, {"id": 4646, "type": "3"}, {"id": 4646, "type": "3"}, {"id": 4646, "type": "3"}, {"id": 4646, "type": "3"}, ]; var count = 0; for(var i=0;i<json.length;i++){ count += json[i].type=="2"?1:0; } alert(count);
------解决方案--------------------
- JScript code
Array.prototype.FindAll = function(fn){ if(typeof(fn) === 'function'){ ret = []; for(var i = 0, l = this.length; i<l; i++){ var o = this[i]; if(fn(o)) ret[ret.length] = o; } return ret; } return null; } var arr = 上面定义的那些数据; alert(arr.FindAll(function(o){return o.type == "1";}).length);