Kozz•2y ago

✅ – bfrisco – 14-14 Dec 18

Is there any shorthand way to do this?

const obj = {};
obj['a']['b']['c'] = 'a'
// Cannot read properties of undefined (reading 'b')

const obj = {};
obj['a']['b']['c'] = 'a'
// Cannot read properties of undefined (reading 'b')

Current solution:

const obj = {}
obj['a'] = {}
obj['a']['b'] = {};
obj['a']['b']['c'] = 'a';

const obj = {}
obj['a'] = {}
obj['a']['b'] = {};
obj['a']['b']['c'] = 'a';

5 Replies

EvokeMe•2y ago

const obj = {a: {b: {c: `a`}}}

const obj = {a: {b: {c: `a`}}}

@bfrisco ^^

Kozz•2y ago

ah, thanks. i'd still want to preserve any other values, but can use optional chaining with destructuring i believe

EvokeMe•2y ago

Also u can use dynamic keys, like this:

const key = `b`
const obj = {a: {[key]: {c: `a`}}}

const key = `b`
const obj = {a: {[key]: {c: `a`}}}

@bfrisco ^^

Kozz•2y ago

yeah, my actual code is like this now:

stats = {
                  ...stats,
                  [deviceType]: {
                    ...stats?.[deviceType],
                    // etc
                  }
                }

stats = {
                  ...stats,
                  [deviceType]: {
                    ...stats?.[deviceType],
                    // etc
                  }
                }

I think this will work, TY

reactibot•2y ago

This question has an answer! Thank you for helping 😄 If you have a followup question, you may want to reply to this thread so other members know they're related. https://discord.com/channels/102860784329052160/565213527673929729/1054038850541981827 This thread hasn’t had any activity in 12 hours, so it’s now locked. Threads are closed automatically after 12 hours. If you have a followup question, you may want to reply to this thread so other members know they're related. https://discord.com/channels/102860784329052160/565213527673929729/1054038850541981827