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I have the following object:

var inv = {roles: {"xxx00": {roleId: "zzzz33"}}, assign: [1, 2, 3] }

This is the result: 

{ roles: { "1234": {roleId: null}, "5678": {roleId: null}}}

I need to consolidate the object with this result: 

{roles: {"1234": {roleId: null}, "5678": {roleId: null}, "xxx00": {roleId: "zzzz33"}}, assign: [1, 2, 3] }

And I need to get that with the spread syntax

Any idea how the syntax should be to get this result without losing the original roleId?

Patrick Roberts
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Leonardo Uribe
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  • I would try something along the lines of `({...a, ...b})` where `a` and `b` are your two objects. – Yoric May 31 '18 at 13:42
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    The `...` construct is *not* an "operator". It's a syntactic element but not part of the expression grammar. – Pointy May 31 '18 at 13:42

2 Answers2

2

Below are two examples one with no object mutation, the other with. 

let inv = {roles: {"xxx00": {roleId: "zzzz33"}}, assign: [1, 2, 3] };
let res = { roles: { "1234": {roleId: null}, "5678": {roleId: null}}};

// create new object to spec, no mutation.
let combine = { roles: { ...inv.roles, ...res.roles, }, assign: [ ...inv.assign ] };
console.log(combine);

// mutate original object.
console.log(inv);
inv.roles = {  ...inv.roles, ...res.roles, };
console.log(inv);
D Lowther
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1

just do this

const consolidated = {...inv, roles: {...inv.roles, ...result.roles} };

Assuming you only want to merge your result roles with the inv var roles, this will create consolidated based on inv but with result roles merged in inv roles.

Simon Mulquin
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