Piyush Chauhan piyushchauhan2011

Haskell, Stack and Intellij IDEA IDE setup tutorial how to get started

Upon completion you will have a sane, productive Haskell environment adhering to best practices.

Basics

Haskell is a programming language.
Stack is tool for Haskell projects. (similar tools for other languages include Maven, Gradle, npm, RubyGems etc)
Intellij IDEA IDE is a popular IDE.

Install required libraries

sudo apt-get install libtinfo-dev libghc-zlib-dev libghc-zlib-bindings-dev

These links no longer work. Springer have pulled the free plug.

Graduate texts in mathematics

duplicates = multiple editions

A Classical Introduction to Modern Number Theory, Kenneth Ireland Michael Rosen

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics

elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent

Using Mailboxes in Elm

Max Goldstein | July 30, 2015 | Elm 0.15.1

In Elm, signals always have a data source associated with them. Window.dimensions is exactly what you think it is, and you can't send your own events on it. You can derive your own signals from these primitives using map, filter, and merge, but the timing of events is beyond your control.

This becomes a problem when you try to add UI elements. We want to be able to add checkboxes and dropdown menus, and to receive the current state of these elements as a signal. So how do we do that?

The Bad Old Days

Learning FP the hard way: Experiences on the Elm language

by Ossi Hanhinen, @ohanhi

with the support of Futurice 💚.

Licensed under CC BY 4.0.


	var gulp = require('gulp');

	var exec = require('child_process').exec;

	var cmakeCommand = "mkdir -p build; cd build; cmake ..;";
	var cleanCommand = "rm -rf build";
	var testCommand = "cd build; ctest -V";

	//"cmake --build ."

	'use strict';
	const statusCodes = require('http').STATUS_CODES;

	function createError(code, name) {
	return function(message) {
	Error.captureStackTrace(this, this.constructor);
	this.name = name;
	this.message = message;
	this.statusCode = code;
	}

	const I = x => x
	const K = x => y => x
	const A = f => x => f (x)
	const T = x => f => f (x)
	const W = f => x => f (x) (x)
	const C = f => y => x => f (x) (y)
	const B = f => g => x => f (g (x))
	const S = f => g => x => f (x) (g (x))
	const S_ = f => g => x => f (g (x)) (x)
	const S2 = f => g => h => x => f (g (x)) (h (x))

	import transitions from './transitions.css';

	export default () => (
	<ReactCSSTransitionGroup transitionName={transitions}>
	{ ... }
	</ReactCSSTransitionGroup>
	);

	require 'socket'
	require 'openssl'
	require 'puma/server'
	require 'ds9'

	class Server < DS9::Server
	def initialize socket, app
	@app = app
	@read_streams = {}
	@write_streams = {}