elbow-jason

defmodule Trier do
  require IEx

  def thing do
    x = 0

    try do
      1 / x
    rescue
      e in ArithmeticError ->

elbow-jason

defmodule ImportExample do

  # on this line Enum is not imported, yet.

  import Enum #imports are not Module-wide. they only apply below the import.

  def all_funcs do
    map([1,2,3], fn n -> n + 1 end) #map is from Enum
  end

elbow-jason

  defp planting_operations_only do
        from operation in Operation,
      where: operation.operation_type == "planting",
    preload: :variety
  end
  
    def crop_plan_preloads(query) do
        from q in query,
      preload: :crop,
      preload: :fields,

elbow-jason

defmodule SimpleFib do
  def fib(0), do: 0
  def fib(1), do: 1
  def fib(n) do
    do_fib(n, 2, 1, 0)
  end

  defp do_fib(x, x, prev, prevprev) do
    prev + prevprev
  end

elbow-jason

package main

import (
	"math/big"
	"os"
	"strconv"
)

func Fib(n int) *big.Int {
	switch n {

elbow-jason

  def get_floor(instructions) do #snake_cased
    # original
    # list = String.codepoints(instructions)
    # calculateFloor(list)
    
    # here we can use the `|>` (read "pipe") operator like so
    instructions
    |> String.codepoints
    |> calulate_floor

elbow-jason

# don't attempt to sign in nil credentials at all
def create(conn, %{"session" => %{"login" => nil }}), do: nil
def create(conn, %{"session" => %{"password" => nil }}), do: nil

def create(conn, %{"session" => session_params}) do
      member = Repo.one(
        from w in Member,
        where: w.email == ^session_params["login"]
        or w.username == ^session_params["login"]
      )

elbow-jason

    query = from workout in Workout,
      where: workout.id == ^id,
      left_join: group in assoc(workout, :workout_set_groups),
      left_join: set in assoc(group, :workout_sets),
      join: excercise in assoc(group, :excercise),
      preload: [workout_set_groups: {group, excercise: excercise, workout_sets: set}]

elbow-jason

defmodule Something do
  defstruct [
    material: nil
  ]
  
  def get_material(%Something{material: material}) when material |> is_function do
    material.()
  end
  def get_material(%Something{material: material}) do

elbow-jason

Sample service script for debianoids

Look at LSB init scripts for more information.

Usage

Copy to /etc/init.d:

# replace "$YOUR_SERVICE_NAME" with your service's name (whenever it's not enough obvious)