摘要:
var str ="abcabcaaaaa";var map = {}; for(var i = 0;i<str.length;i++){ var s = str[i]; var r = map[s]; if(r){ map[s] +=1; }else{ map[s] = 1; } }console 阅读全文
摘要:
var arr = [ { "CompanySerial": "123", "OldDeviceId": "id111", "HandleState": 2 }, { "CompanySerial": "456", "OldDeviceId": "id111", "HandleState": 2 } 阅读全文