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@httpie/collections

v3.1.4

Published

HTTPie collections

Downloads

2

Readme


Introduction

The @httpie/collections package provides a convenient wrapper to work with arrays.

Installation

npm i @httpie/collections

Docs

Find all the details and available methods in the extensive Supercharge docs.

Usage

The package exports a function accepting an array as a parameter. From there, you can chain all collection methods.

Sync Collections by default

A created collection (Collect([1, 2, 3])) is synchronous by default. That means it behaves like JavaScript’s array methods.

In contrast to JavaScript’s array methods, collections have a lot more methods available making your code a lot simpler. Here are basic examples using a collection:

const User = require('../models/user')
const Collect = require('@httpie/collections')

const users = await User.findAll()

const notSubscribedUsers = Collect(users)
  .filter(user => {
    return user.notSubscribedToNewsletter
  })
  .all()

// notSubscribedUsers = [ <list of not-yet-subscribed users> ]

Here’s another example outlining how to determine whether the array “has” an item:

// “has” in JS Arrays
const hasNotSubscribedUsers = !![].concat(users).find(user => {
  return user.notSubscribedToNewsletter
})

// “has” in Collections
const hasNotSubscribedUsers = Collect(users).has(user => {
  return user.notSubscribedToNewsletter
})

All available methods are outlined in the docs.

Async Collections

The package is async/await-ready and supports async callback functions. A collection becomes async (returns a promise) as soon as you provide an async callback method to methods like map, filter, find, and so on. You then need to await the collection pipeline:

const User = require('../models/user')
const Collect = require('@httpie/collections')

const users = await User.findAll()

const subscribedUsers = await Collect(users)
  .filter(user => {
    return user.notSubscribedToNewsletter
  })
  .map(async user => { // <-- providing an async callback creates an async collection that you need to `await`
    await user.subscribeToNewsletter()

    return user
  })

// subscribedUsers = [ <list of newly-subscribed users> ]

You can directly await async collections without ending the call chain with .all(). You can still call .all() though, it works as well.

Contributing

Do you miss a collection function? We very much appreciate your contribution! Please send in a pull request 😊

  1. Create a fork
  2. Create your feature branch: git checkout -b my-feature
  3. Commit your changes: git commit -am 'Add some feature'
  4. Push to the branch: git push origin my-new-feature
  5. Submit a pull request 🚀

License

MIT © Supercharge


httpiejs.com  ·  GitHub @httpie  ·  Twitter @httpiejs