[英]Removing duplicates from an array of objects
I have an object which has json objects called 我有一个具有json对象的对象
mainobject = 主要对象=
Array[2]
>0: object
>Innerobject1 : Array[2]
>0 : object
Name : "Xavier"
Dup : "B"
>1 : object
Name : "Gh"
Dup : "B"
>1: object
>Innerobject2 : Array[2]
>0 : object
Name : "Cat"
Dup : "C"
>1 : object
Name : "Dog"
Dup : "D"
I need to make the "dup" as "" which was already present in the first object if any .My expected output is: 我需要将第一个对象中已经存在的“ dup”设置为“”,如果有的话。我的预期输出是:
Array[2]
>0: object
>Innerobject1 : Array[2]
>0 : object
Name : "Xavier"
Dup : "B"
>1 : object
Name : "Gh"
Dup : ""
>1: object
>Innerobject2 : Array[2]
>0 : object
Name : "Cat"
Dup : "C"
>1 : object
Name : "Dog"
Dup : "D"
Edit: 编辑:
The object in json format: : json格式的对象:
"[{"Innerobject1":[{"Name" :"Xavier","Dup":"B"},{"Name" :"Gh","Dup":"B"}]},
{"Innerobject2":[{"Name" : "Cat","Dup":"C"},{"Name":"Dog", "Dup":"D"}]}]"
I'm not quite sure that I have interpreted your posted array of objects correct. 我不太确定我是否正确解释了您发布的对象数组。 But you can do something like this:
但是您可以执行以下操作:
Iterate over the array and store the key you want to be unique in an object. 遍历数组并将要唯一的键存储在对象中。 When encountered more then once set the new value to an empty string:
如果遇到更多情况,则将新值设置为空字符串:
var seen = {};
mainobject.forEach(function(obj) {
if (seen[obj.Name]) {
obj.Name = "";
}
seen[obj.Name] = true;
});
You might need multiply iterations, dependents on how many nested arrays you got: 您可能需要多次迭代,具体取决于您获得了多少个嵌套数组:
var seen = {};
mainobject.forEach(function(inner_arr) {
inner_arr.forEach(function(obj) {
if (seen[obj.Name]) {
obj.Name = "";
}
seen[obj.Name] = true;
});
});
The solution using Array.forEach
and Object.keys
functions: 使用
Array.forEach
和Object.keys
函数的解决方案:
var mainobject = JSON.parse('[{"Innerobject1":[{"Name" :"Xavier","Dup":"B"},{"Name" :"Gh","Dup":"B"}]},{"Innerobject2":[{"Name" : "Cat","Dup":"C"},{"Name":"Dog", "Dup":"D"}]}]');
mainobject.forEach(function(obj){
Object.keys(obj).forEach(function(k){
obj[k].forEach(function(o){
if (this["Dup"]) {
(this["Dup"].indexOf(o["Dup"]) !== -1)? o["Dup"] = "" : this["Dup"].push(o["Dup"]);
} else {
this["Dup"] = [o["Dup"]];
}
})
});
}, {});
console.log(JSON.stringify(mainobject, 0, 4));
The console.log
output: console.log
输出:
[
{
"Innerobject1": [
{
"Name": "Xavier",
"Dup": "B"
},
{
"Name": "Gh",
"Dup": ""
}
]
},
{
"Innerobject2": [
{
"Name": "Cat",
"Dup": "C"
},
{
"Name": "Dog",
"Dup": "D"
}
]
}
]
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