tbarbugli

How to build a notification feed using Stream

Introduction

In this tutorial we are going to show how easy it is to build a notification feed using GetStream.io. First of all, let's quickly introduce you to our fictional example app. It's called bug-your-friends.com and allows you interact with your friends, ping them, follow them or poke them. Here's a quick list of example interactions:

• poke another user (eg. Thierry pokes Alessandra)
• follow a user (eg. Tommaso follows Iris)
• ping a user (eg. Josie pings Carolina)

Whenever a user is part of one of these interactions, we want to update his notification feed, update the number of unseen and unread

joshbuchea

Semantic Commit Messages

See how a minor change to your commit message style can make you a better programmer.

Format: <type>(<scope>): <subject>

<scope> is optional

Example

sasa1977

# http://adventofcode.com/2017/day/1

defmodule Day1 do
  def sum1(digits), do:
    digits
    |> Stream.concat(Enum.take(digits, 1))
    |> Stream.chunk_every(2, 1, :discard)
    |> Stream.filter(&match?([el, el], &1))
    |> Stream.map(&hd(&1))
    |> Enum.sum()