How to modify my array to get 4 different array based on the value of the objects inside the array

Question

I have an array of objects, each of these objects have a capability attribute, there are 4 different types, I want to split the array into 4 different arrays based on what their capability value is.

Tried to map but couldnt work out how to do it based on one of their values.

ngOnInit(){
    this.questionsService.getQuestions().subscribe(
        data => {
            this.questions = [];
            Object.keys(data).map((key)=>{ this.questions.push(data[key])});
            console.log(this.questions);
        }
    );
}

Examples of the objects:

{
    "Capability": "Associate",
    "SubCategory": "Core Skills",
    "Skill": "Communication",
    "SkillID": 1
},
{
    "Capability": "CCM",
    "SubCategory": "Other Skills",
    "Skill": "Data Protection/ GDPR",
    "SkillID": 34
}

I want the array of questions to be split into four different arrays, an array each for the different values of capability.

Can you cut down your code to the actually necessary code? I fail to see the part your asking about. — skolldev, Aug 01 '19 at 07:54
You might want to show an example of object and the desired output of that object after splitting aka in json how do they look like — CozyAzure, Aug 01 '19 at 07:59
Possible duplicate of [Most efficient method to groupby on an array of objects](https://stackoverflow.com/questions/14446511/most-efficient-method-to-groupby-on-an-array-of-objects) — pascalpuetz, Aug 01 '19 at 08:01
Edited to show an example of the objects, output needs to be four arrays for the 4 different values of capability — Luke Harland, Aug 01 '19 at 08:02

valhalla ross ferrer · Answer 1 · 2019-08-01T08:19:43.670

0

I think your issue is same with here How to group an array of objects by key

var myArray = [
{ capability: 1, id: 1},
{ capability: 1, id: 2},
{ capability: 2, id: 3},
{ capability: 3, id: 4},
{ capability: 4, id: 5}
]
var result = myArray.reduce(function (r, a) {
r[a.capability] = r[a.capability] || [];
r[a.capability].push(a);
return r;
}, Object.create(null));

console.log(result);

edited Aug 01 '19 at 08:19

answered Aug 01 '19 at 08:06

valhalla ross ferrer

74
10

How to modify my array to get 4 different array based on the value of the objects inside the array

1 Answers1