[英]Array objects difference javascript angularjs
I have 2 array objects and I want to get the difference between them as follows: 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"}]
Here is the code: 这是代码:
$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);
The problem with the above code is I dont get the desired result. 上面代码的问题是我得不到想要的结果。 Please let me know what is going wrong.
请告诉我出了什么问题。
That is not related to Angular. 这与Angular无关。
You could do something like this: 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;
});
Or with ES6 syntax: 或者使用ES6语法:
var result = array1.filter(i1 => !array2.some(i2 => i1.id === i2.id));
I think this is not related to Angular itself. 我认为这与Angular本身无关。 You're looking for an algorithm to compute a difference between 2 sets.
您正在寻找一种算法来计算2组之间的差异。
The topic has already been discussed . 这个话题已经讨论过了 。 You may also be interested on this underscore plugin
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