JS 求 2個對象數組的差值

有兩個對象數組,求 差值: 需要得到新數組: [{a:3},{a:4},{a:5},{a:6}]

var arr1 = [{a:1},{a:2},{a:3},{a:4},{a:5},{a:6},{a:7}]; var arr2 = [{a:1},{a:2},{a:7}] 

var arr3 = []; arr1.forEach(item1 => { var flag = false; arr2.forEach(item2 => { if (item1.a === item2.a) { flag = true; } }) if (!flag) { arr3.push(item1); } }) console.log(arr3)

轉自於：https://blog.csdn.net/qq_37167049/article/details/103401023