var arr = [{"code":"111","num":1},{"code":"112","num":1},{"code":"111","num":3},{"code":"113","num":1},{"code":"113","num":5},{"code":"111","num":1}]//像這樣的一個數組，比較對象code，如果相等，取其num相加的值輸出。
javascript同數組里的對象比較，相等的話對象里的值累加。
翻閱古今
2018-09-14 10:08:00