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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

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IO.inspect for n <- ?A..?Z, m <- ?a..?z, do: <<m,n :: utf8>>


#["aA", "bA", "cA", "dA", "eA", "fA", "gA", "hA", "iA", "jA", "kA", "lA", "mA",
 "nA", "oA", "pA", "qA", "rA", "sA", "tA", "uA", "vA", "wA", "xA", "yA", "zA",
 "aB", "bB", "cB", "dB", "eB", "fB", "gB", "hB", "iB", "jB", "kB", "lB", "mB",
 "nB", "oB", "pB", "qB", "rB", "sB", "tB", "uB", "vB", "wB", "xB", ...]
["aA", "bA", "cA", "dA", "eA", "fA", "gA", "hA", "iA", "jA", "kA", "lA", "mA",
 "nA", "oA", "pA", "qA", "rA", "sA", "tA", "uA", "vA", "wA", "xA", "yA", "zA",
 "aB", "bB", "cB", "dB", "eB", "fB", "gB", "hB", "iB", "jB", "kB", "lB", "mB",

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Advanced Bash Usage Cheat Sheet

These commands were taking from the talk Introduction to Advanced Bash Usage by James Pannacciulli

Updated 21 Jan 2017 06:54:53

Getting help

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defmodule Ticker do
  require Logger
  # public api
  def start(recipient_pid, tick_interval, duration \\ :infinity) do
    # Process.monitor(pid) # what to do if the process is dead before this?
    # start a process whose only responsibility is to wait for the interval
    ticker_pid = spawn(__MODULE__, :loop, [recipient_pid, tick_interval, 0])
    # and send a tick to the recipient pid and loop back
    send(ticker_pid, :send_tick)
    schedule_terminate(ticker_pid, duration)

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const R = require("ramda");
const speakers = ["Arpit", "Ani", "Rahul"];
let sum = R.add(2, 3);
sum;
speakers;
const acctDept = {
  name: "Accounts Payable",
  location: "14th floor",
  personnel: {
    manager: {

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`:kill-server`

`prefix + n,p` => to move between windows
`prefix + c` => create new windows
`prefix + d` => detach tmux
`Prefix + S` => Navigate sessions with j, k (or arrow keys)
`prefix + :new –s session_name` => create new session
`prefix + hjkl or arrow keys` => switch panes
 

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import Ember from 'ember';

const BlogCommentComponent = Ember.Component.extend({
});

BlogCommentComponent.reopenClass({
  positionalParams: ['comment']
});

export default BlogCommentComponent;

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import Ember from 'ember';

export default Ember.Component.extend({
});

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if [ -z $1] ; then
  echo "please provide an argument"
  read ARG
else
  ARG=$1
fi

echo "your argument was $ARG"

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defmodule Box do
  defmacro __using__(_env) do
    quote do
      import Box
    end
  end

  @doc """
  Define module with struct and typespec, in single line