Compare 2 Objects Value and key

Question

I have 2 objects:

Obj1 = {
  0: "AS1",
  1: "AS2",
  2: "AS3"
}


Obj2 = {
  AS1: "Hani"
  AS2: "Joe"
}

I want to compare the value of Obj1 with the key of Obj2 and print Obj2 values.

Does this answer your question? [Object comparison in JavaScript](https://stackoverflow.com/questions/1068834/object-comparison-in-javascript) — norbitrial, Mar 25 '20 at 18:38
@NinaScholz i have table, i want to print all values from Obj2 depends on the Keys in Obj1 — Hani Gerges, Mar 25 '20 at 18:39

Nina Scholz · Answer 1 · 2020-03-25T19:26:24.010

2

You could take an array with the values of obj1 and iterate for the keys of obj2.

var obj1 = { 0: "AS1", 1: "AS2", 2: "AS3" },
    obj2 = { AS1: "Hani", AS2: "Joe" },
    result = Object.assign([], obj1).map(k => k in obj2 ? obj2[k] : null);

console.log(result);

edited Mar 25 '20 at 19:26

answered Mar 25 '20 at 18:43

Nina Scholz

376,160
25
347
392

Good use of `Object.assign` +1 – Code Maniac Mar 25 '20 at 18:52
how to return all values in Obj1 with there names from Obj2 in (return) please, in the example above i should return 3 values Hani,Joe,Null – Hani Gerges Mar 25 '20 at 19:22
what means return? do you want an array of values with `null` for `undefined` properties? – Nina Scholz Mar 25 '20 at 19:24

score 1 · Answer 2 · answered Mar 25 '20 at 18:43

1

I'm not sure what is it that you want to achieve but You can access the values you need like this:

let Obj1values = Object.values(Obj1);

console.log(Obj1values)

let Obj2Keys = Object.keys(Obj2);

console.log(Obj2Keys)

answered Mar 25 '20 at 18:43

AdamKniec

1,607
9
25

score 1 · Accepted Answer · answered Mar 25 '20 at 18:44

1

let ob1 = {0: "AS1", 1: "AS2", 2: "AS3" }

let ob2 = {AS1: "Hani", AS2: "Joe" }

let ob1Vals = Object.values(ob1)
let ob2Keys = Object.keys(ob2)

console.log(ob1Vals, ob2Keys)

ob2Keys.forEach(e => {
    if(ob1Vals.includes(e)) {
        console.log(ob2[e])
    }
})

answered Mar 25 '20 at 18:44

Arpit

467
1
8
18

Although this code might solve the problem, a good answer should also explain what it does and how it helps. – BDL Mar 26 '20 at 10:37

score 1 · Answer 4 · answered Mar 25 '20 at 18:58

This is essentially the equivalent to Excel's VLOOKUP function (sans the exact match option).

Search the source object by the value of the current User and return the Name value. Since this is a scalar value, no field/index is needed.

const lookup = (value, source, field) => {
  return ((match) => {
    return match && field ? match[field] : match || null;
  })(source[value]);
}

let Users = {
  0: "AS1",
  1: "AS2",
  2: "AS3"
}

let Names = {
  AS1: "Hani",
  AS2: "Joe"
}

console.log(Object.keys(Users).map(id => {
  return lookup(Users[id], Names);
}));

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Compare 2 Objects Value and key

4 Answers4