每个月账单的收入和支出怎么计算

Question

 array:[            {                 "tradeTime":[                     {                         "amount":-5000,                         "goodsInfo":"翡翠城租金",                         "tradeTime":"2019-04-20"                     },                                             {                         "amount":2000,                         "goodsInfo":"收入",                         "tradeTime":"2019-04-21"                     },                     {                         "amount":-1200,                         "goodsInfo":"五联西苑租金",                         "tradeTime":"2019-04-25"                     },                     {                         "amount":-200,                         "goodsInfo":"爱与家宾馆",                         "tradeTime":"2019-04-30"                     }                 ]             },             {                 "tradeTime":[                     {                         "amount":-3800,                         "goodsInfo":"丁香花园",                         "tradeTime":"2019-05-20"                     },                                             {                         "amount":5000,                         "goodsInfo":"收入",                         "tradeTime":"2019-05-22"                     },                     {                         "amount":-2500,                         "goodsInfo":"滨兴小区",                         "tradeTime":"2019-05-28"                     }                 ]             },             {                 "tradeTime":[                     {                         "amount":-2800,                         "goodsInfo":"滨苑小区",                         "tradeTime":"2019-06-08"                     }                 ]             }         ]

Answer 1

依据月份，金额分组， 正则提取，多值化一即可。若不想自己写，直接使用第三方库