How can I find an object in an object array?

Question

Here's an obj.

var person = {
    no: 4,
    name: "Jack",
    hobbies:["soccer, dancing"],
    club: "lion"
}

Here's object arraies.

var club = {
    no: 2,
    name: "lion",
    teacher: "Linda",
    num: 24
    students: [person, person2, person3, ...]
}

var school = {
    no: "NW-10",
    name: "The school of Victory",
    address: "23 Vega St. Gorgia, Texas",
    classes: [club, club2, club3, ...]
}

I'd like to find a class in the school. School is only one. And Class, Person are multiple.

And I'd like to add, remove, edit school it belongs to and the class.

Is there any way to find an object with an index? I mean like a HashMap. You access a value with a string like this.

var mAge = mPerson["age"];
var mAge = mPerson.age;

I can find the object with for loop but, the login seems very complicated and not efficient as much as O(n^2).

Edit

I'd like to accomplish get, put, remove, edit in an array with Object.

For example,

I want to remove person3. Then, I can find its class like this.

school[person.club].remove(); // The club item is removed.

school2[person.club].put(2); // The club item is added after second club object.

It will find the item in O(n).

Your objects are invalid JavaScript. This is incorrect: `hobbies:{"soccer, dancing"}`. — Robby Cornelissen, Oct 10 '19 at 05:34
either this: https://stackoverflow.com/questions/237104/how-do-i-check-if-an-array-includes-an-object-in-javascript?rq=1 or this: https://stackoverflow.com/questions/4775722/how-to-check-if-an-object-is-an-array?rq=1 — Harry Joy, Oct 10 '19 at 05:35
Could you add more details on what you are trying to accomplish ? — giuseppedeponte, Oct 10 '19 at 05:37
@Teemu I know `class` can't be used, This is just an example how they look like. — c-an, Oct 10 '19 at 06:52
@GlenK I added more information about my question. Could you answer it? — c-an, Oct 10 '19 at 07:39
Now after your edit, the question is clear, but far too broad considering you haven't tried anything. I'd suggest you an OOP approach, create a prototype/class of the objects, add the methods you need to that, and an object factory to create new objects. — Teemu, Oct 10 '19 at 08:02

score 0 · Answer 1 · answered Oct 10 '19 at 22:30

If you want a specific functionality, I would create a function for it. For example you can create removeClub function and putClub function:

var person = {
    no: 4,
    name: "Jack",
    hobbies:["soccer, dancing"],
    club: "lion"
};

var club = {
    no: 2,
    name: "lion",
    teacher: "Linda",
    num: 24,
    students: [person]
}

var school = {
    no: "NW-10",
    name: "The school of Victory",
    address: "23 Vega St. Gorgia, Texas",
    classes: [club]
};

function removeClub(clubName){
  var clubIndex = school.classes.findIndex(c => c.name === clubName);
  school.classes.splice(clubIndex, 1);
}

function putClub(clubName, index){
  school.classes.splice(index, 0, clubName);
}

removeClub(person.club);
putClub(person.club,0);
console.log(school);

I tried this method and I don't know if an object works as well. I did `slice(index, 1)` to remove the Object element and It is not removed. — c-an, Oct 14 '19 at 03:13

How can I find an object in an object array?

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1 Answers1