数组对象差异 javascript angularjs

Question

我有 2 个数组对象，我想得到它们之间的区别如下：

array1 = [{"name":"MPCC","id":"tool:mpcc"}, {"name":"APP","id":"tool:app"}, {"name":"AII","id":"tool:aii"}, {"name":"VZZ","id":"tool:vzz"}, {"name":"USU","id":"tool:usu"}]

array2 = [{"name":"APP","id":"tool:app"}, {"name":"USU","id":"tool:usu"}]

result = [{"name":"MPCC","id":"tool:mpcc"}, {"name":"AII","id":"tool:aii"}, {"name":"VZZ","id":"tool:vzz"}]

代码如下：

$scope.initial = function(base, userData){
    var result = [];
    angular.forEach( base, function(baseItem) {
        angular.forEach( userData, function( userItem ) {
            if ( baseItem.id !== userItem.id ) {
                if (result.indexOf(baseItem) < 0) { 
                    result.push(baseItem);
                }
            }
        });
    });
    return result;
}
$scope.initial(array1, array2);

上面代码的问题是我没有得到想要的结果。请让我知道出了什么问题。

Answer 1

与Angular无关。

你可以这样做：

var result = array1.filter(function(item1) {
  for (var i in array2) {
    if (item1.id === array2[i].id) { return false; }
  };
  return true;
});

或使用 ES6 语法：

var result = array1.filter(i1 => !array2.some(i2 => i1.id === i2.id));

Answer 2

我认为这与Angular本身无关。您正在寻找一种算法来计算两组之间的差异。

话题已经discussed. You may also be interested on this underscore plugin

数组对象差异 javascript angularjs

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