Question

我有以下对象数组

a = [{c:1, r:2}, {c:2, r:2}, {c:3, r:2}]
b = [{c:1, r:1}, {c:2, r:2}, {c:3, r:3}]

现在我要删除这个常见对象，

Like var result = removeCommon(a, b);
Output result = [{c:1, r:2}, {c:2, r:2}, {c:3, r:2}, {c:1, r:1}, {c:3, r:3}]

我需要最好的方法，因为数组大小很大

Answer 1

我找到了解决方法

_.uniq(a.concat(b), function(array){
    return "c:" + array.c + "r:" + array.r;
})

result : [{c:1, r:2}, {c:2, r:2}, {c:3, r:2}, {c:1, r:1}, {c:3, r:3}]

Answer 2

我的解决方案（没有外部库）：

var a = [{c:1, r:2}, {c:2, r:2}, {c:3, r:2}];
var b = [{c:1, r:1}, {c:2, r:2}, {c:3, r:3}];
var c = removeCommon(a, b);

console.log(c);

function removeCommon(a, b) {
  var result = {};

  a.concat(b).forEach(function (i) {
    result['c' + i.c + 'r' + i.r] = i;
  });

  return Object.keys(result).map(function (k) {
    return result[k];
  });
}

a fiddle。

在Javascript中从对象数组中删除公共对象的最佳方法

2 个答案: