CODEWITHSUNDEEP
javascriptobjectdiscord.js
Joaquin Parada
Joaquin Parada

Reputation: 47

Access the second item in Collection [Map]

I'm making a discord bot, and fetching some messages. I got this object

//This parameters changue every time i fetch
Collection(3) [Map] {
  '848689862764789770' => Message {...
  }
  '848689552410804234' => Message {...
  }
  '848689534485004319' => Message {...
  }

I can access the first and third entry using .first() and .last().

I've been trying to use Object.keys() but it returns undefined.

const mensajes = await message.channel.messages.fetch({ limit: 3 });
                
console.log(mensajes[Object.keys(mensajes)[1]])

Upvotes: 2

Views: 1313

Answers (2)

Elitezen
Elitezen

Reputation: 6730

Tip: .first() can take a parameter that will return the first x amount of entries you choose and will then convert the Collection into an Array. Do .first(2) - this will return the first 2 entries - and then access the 2nd element as you would with any other Array.

// Will return 2nd entry
<Collection>.first(2)[1]

Suggested Solution: You can also call .array() on the Collection to directly convert it into an Array.

// Also returns 2nd entry
<Collection>.array()[1]

<Collection> is a placeholder for your actual object

Learn more about working with Collections in This Guide

Upvotes: 4

MattieTK
MattieTK

Reputation: 521

DiscordJS's docs has some information on this. You can transform this Collection utility class intro an array with a bunch of methods that exist for it, depending on what you need to access.

Then you can use the array, for example, to access the specific value.

// For values. Array.from(collection.values());

// For keys. Array.from(collection.keys());

// For [key, value] pairs. Array.from(collection);

Upvotes: 1

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