metame metame

Monads Conceptually

Fundamental knowledge

Before talking about monads, we should review 3 concepts:

Functions

They appear in the form f :: a -> b, where :: indicates the type of f.

Applied Functional Programming with Scala - Notes

1. Mastering Functions

A function is a mapping from one set, called a domain, to another set, called the codomain. A function associates every element in the domain with exactly one element in the codomain. In Scala, both domain and codomain are types.

val square : Int => Int = x => x * x

Creating a Happy Git Environment on OS X

Step 1: Install Git

brew install git bash-completion

Configure things:

git config --global user.name "Your Name"

git config --global user.email "[email protected]"

	use std::str;

	fn main() {
	// -- FROM: vec of chars --
	let src1: Vec<char> = vec!['j','{','"','i','m','m','y','"','}'];
	// to String
	let string1: String = src1.iter().collect::<String>();
	// to str
	let str1: &str = &src1.iter().collect::<String>();
	// to vec of byte

	Here's how to make jQuery DataTables work with npm and webpack. DT checks for AMD compatibility first
	which breaks when you're using CommonJS with webpack.

	Install DT core: npm install datatables.net
	Install a DT style: npm install datatables.net-bs (bootstrap)
	Install the imports-loader webpack plugin: https://github.com/webpack/imports-loader#disable-amd
	Create a loader "exception" just for DT in webpack.config.js:

	module: {
	loaders: [

	var request = require('supertest'),
	should = require('should'),
	app = require('../server');

	var Cookies;

	describe('Functional Test <Sessions>:', function () {
	it('should create user session for valid user', function (done) {
	request(app)
	.post('/v1/sessions')

	# Never save database creditentials in your repo. Keep a dummy copy with a different name eg "local.xml.dev"
	app/etc/local.xml

	downloader
	# If you'd like to keep the downloader, use the following instead:
	# downloader/.cache
	# downloader/cache.cfg
	# downloader/connect.cfg

	# All of the var folders can be excluded.