chrismccord

Phoenix 1.4.x to 1.5.0 upgrade instructions

Phoenix 1.5 requires Elixir >= 1.7. Be sure your existing version is up to date by running elixir -v on the command line.

Install the new phx.new project generator

$ mix archive.uninstall phx_new
$ mix archive.install hex phx_new 1.5.0

dglaude

import time
import board
import busio
import adafruit_mlx90640

import displayio

number_of_colors = 13

palette = displayio.Palette(number_of_colors)  # Palette with all our colors

steven2358

FFmpeg cheat sheet

A list of useful commands for the FFmpeg command line tool.

Download FFmpeg: https://www.ffmpeg.org/download.html

Full documentation: https://www.ffmpeg.org/ffmpeg.html

Basic conversion

jhowarth

defmodule GCM.Pusher do
  use GenStage
  # The maximum number of requests Firebase allows at once per XMPP connection
  @max_demand 100 
  
  defstruct [
    :producer,
    :producer_from,
    :fcm_conn_pid,
    :pending_requests,

jhowarth

defmodule GCM.PushCollector do
  use GenStage
  
  # Client
  
  def push(pid, push_requests) do
    GenServer.cast(pid, {:push, push_requests})
  end
  
  # Server

ulve

#!/bin/bash
sudo apt-get update
sudo apt-get --assume-yes install wget
sudo apt-get --assume-yes install libssl-dev
sudo apt-get --assume-yes install ncurses-dev
sudo apt-get --assume-yes install m4
# erlang
wget http://erlang.org/download/otp_src_18.2.tar.gz
tar -xvzf otp_src_18.2.tar.gz
cd otp_src_18.2

whatyouhide

defmodule TestDefp do
  defmacro __using__(_) do
    quote do
      import Kernel, except: [defp: 2]
    end
  end

  # Let's redefine `defp/2` so that if MIX_ENV is `test`, the function will be
  # defined with `def/2` instead of `defp/2`.
  defmacro defp(fun, body) do

bvandgrift

;; response to: https://forums.pragprog.com/forums/352/topics/13835

;; this is a quick demonstration of the pitfalls in querying for a ref
;; outside of the accompanying transaction in which you plan on changing it.

(import '(java.util.concurrent Executors))

;; start list
(def slist (ref #{}))

Shoozza

@ECHO OFF
SETLOCAL
GOTO:MAIN

REM
REM Info functions start
REM

REM Display version and copyright information
:VERSION

pnc

Using OTP's observer (appmon replacement) remotely

$ ssh remote-host "epmd -names"
epmd: up and running on port 4369 with data:
name some_node at port 58769

Note the running on port for epmd itself and the port of the node you're interested in debugging. Reconnect to the remote host with these ports forwarded:

$ ssh -L 4369:localhost:4369 -L 58769:localhost:58769 remote-host