lbvf50mobile

Lambda: standard

# Creating a lambda
l = lambda { |name| "Hi #{name}!" }

# Executing the lambda
l.call("foo") # => Hi foo!

git clone https://gist.github.com/ishu3101/6fb35afd237e42ef25f9

mv 6fb35afd237e42ef25f9 ConvertTo-Markdown

cd ConvertTo-Markdown

Thanks to this article by Christoph Berg

Directories and files

~/

You're taking your first steps into Ruby

A good introduction to programming in general. Easy on newer programmers.

The set lines

These lines deliberately cause your script to fail. Wait, what? Believe me, this is a good thing.
With these settings, certain common errors will cause the script to immediately fail, explicitly and loudly. Otherwise, you can get hidden bugs that are discovered only when they blow up in production.

set -e
set -u

	require 'fileutils'

	# __FILE__ keyword in ruby
	puts "The current ruby file being executed is #{__FILE__}"

	# Gets the directory name of the file being executed
	current_directory = File.dirname(__FILE__)
	puts "The current directory is #{current_directory}"

	# expands to reveal the pwd (Present working directory)

	require "resolv"

	class Model < ActiveRecord::Base
	validates :ip_address, format: { with: Resolv::IPv4::Regex }
	validates :mac_address, format: { with: /\A([0-9A-F]{2}[-:]){5}([0-9A-F]{2})\z/ }
	end

	// without callback
	Array.prototype.eachSlice = function (size){
	this.arr = []
	for (var i = 0, l = this.length; i < l; i += size){
	this.arr.push(this.slice(i, i + size))
	}
	return this.arr
	};

	[1, 2, 3, 4, 5, 6].eachSlice(2)

	// https://developer.mozilla.org/ja/New_in_JavaScript_1.7#Array_comprehensions
	function range (begin, end) {
	for (let i = begin; i < end; ++i) {
	yield i;
	}
	};

	// http://code.activestate.com/recipes/347689-ruby-arrayeach_cons-each_slice-overlapping-and-non/
	function each_cons (l, n) {
	return [l.slice(i, i + n) for (i in (range(0, l.length - n + 1)))]

	package main

	import (
	"strings"
	)

	func main() {
	strings.HasPrefix("foobar", "foo") // true
	}