Frost

defmodule GoogleBooks do
  use HTTPoison.Base

  @base_url "https://www.googleapis.com/books/v1/volumes?q=isbn:"

  def process_url(isbn13) do
    isbn = String.replace(isbn13, "-", "")
    @base_url <> isbn
  end

Frost

First off, install cowsay, and some PostgreSQL language extension, like [plsh](https://github.com/petere/plsh).

Now, make sure to install the language extension in your database:

    $ psql
    = CREATE EXTENSION plsh;

Now what you need is a function that takes some input and prints it using cowsay:

    =# CREATE FUNCTION cowsay (input text) RETURNS text

Frost

Calling eh from vim

I use vim, and I occasionally write Elixir code.

Vim has built-in support for looking up documentation, keywordprg.

So since I wanted to be able to look up Elixir documentation from vim, I wrote an elixir package called eh, which is available on hex.

To call eh from vim, add the following to your .vimrc:

Frost

Take this snippet, borrowed from the coffeescript changelog:

$ 'body'
.click (e) ->
  $ '.box'
  .fadeIn 'fast'
  .addClass '.active'
.css 'background', 'white'

Frost

expression	JavaScript	CoffeeScript	LiveScript
1 + 2	3	3	3
1 + "2"	'12'	'12'	'12'
"2" + 1	'21'	'21'	'21'
1 * 2	2	2	2
"1" * 2	2	2	'11'
1 * "2"	2	2	''
1 / 2	0.5	0.5	0.5
"1" / 2	0.5	0.5	0.5

Frost

module.exports = exports = ObjectWithDefaultProperty;
function ObjectWithDefaultProperty(properties, defaultValue) {
  return Proxy.create({
    get: function get(proxy, name) {                       
      if (name in properties) {
        return properties[name];
      } else {
        return defaultValue;
      }
    }

Frost

#!/usr/bin/env bash

# only move files older than 5 days
maxdate=$( date +%Y-%m-%d -d '5 days ago')

# set source and destination folders unless set by env
[ -z "$LOG_SOURCE" ] && LOG_SOURCE="/source/path"

for file in $LOG_SOURCE/*.log.*; do
  # example:

Frost

foo = {foo: \foo}

bar = ->
  console.log foo
  foo ?= {bar: \bar}
  return foo

Frost

Express.js nested apps and routing

So... Say we are building this API in express.js, and it's supposed to have these routes:

/v1
   /ping
   /foo
       /bar
       /baz

Frost

# So... hash.new takes an optional parameter with a default value, that's neat.

> hash = Hash.new(0)
> hash["foo"]
=> 0
> hash["bar"] += 5
=> 5
> hash
=> {"bar" => 5}