Assign value from one array as a key to another array using lodash javascript [duplicate]

Question

I have 2 arrays -

1- Numbers = [3,4,5]
2- selection= [ [1,2,3,4],[6,5,4,3],[2,9,4]]

Now in output I want 3 should be key i.e index of [1,2,3,4] and so on

Output should be below -

  selection= = { '3':[1,2,3,4] ,'4':[6,5,4,3] ,'5':[2,9,4]}

Iterate, get elements at current index from both arrays, add into object. Why you need lodash for that? — Tushar
– Tushar, Commented Nov 23, 2016 at 13:44

stasovlas · Accepted Answer · 2016-11-23 13:58:34Z

4

just use _.zipObject https://lodash.com/docs/4.17.2#zipObject

_.zipObject(Numbers, selection)

edited Nov 23, 2016 at 13:58

answered Nov 23, 2016 at 13:50

stasovlas

7,4362 gold badges30 silver badges30 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Stephan Bijzitter Over a year ago

This answer should clarify that it is using lodash. The only hint is the tag in the question, which is definitely not enough. Likewise, posting just a code snippet cannot possibly qualify as an "answer", even if it is technically correct.

Aks Over a year ago

Despite.. He got the most upvote here, because he is right and because he read the question AND the tag. The answer can be found in lodash documentation, there is nothing to add I think.

Nina Scholz · Accepted Answer · 2016-11-23 13:54:31Z

3

in plain Javascript, you could iterate numbers and build a new object with a number as key and take as value the item of selection with the same index.

var numbers = [3, 4, 5],
    selection = [[1, 2, 3, 4], [6, 5, 4, 3], [2, 9, 4]],
    result = {};

numbers.forEach(function (k, i) {
    result[k] = selection[i];
});

console.log(result);

ES6

var numbers = [3, 4, 5],
    selection = [[1, 2, 3, 4], [6, 5, 4, 3], [2, 9, 4]],
    result = numbers.reduce((r, k, i) => Object.assign(r, { [k]: selection[i] }), {});

console.log(result);

edited Nov 23, 2016 at 13:54

answered Nov 23, 2016 at 13:46

Nina Scholz

388k26 gold badges367 silver badges417 bronze badges

Collectives™ on Stack Overflow

Assign value from one array as a key to another array using lodash javascript [duplicate]

2 Answers 2

2 Comments

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

Comments

Linked

Related