Constantin Kulikov Bad-ptr

I'm looking to collect information on why certain functionality found in Erlang/OTP is usually handled instead by a third party library in people's projects.

This could be bugs, missing functionality, poor interface, performance, etc.

Examples off the top of my head that need expanding on are:

httpc
httpd
http_uri

Reader Macros in Common Lisp

This post also appears on lisper.in.

Reader macros are perhaps not as famous as ordinary macros. While macros are a great way to create your own DSL, reader macros provide even greater flexibility by allowing you to create entirely new syntax on top of Lisp.

Paul Graham explains them very well in [On Lisp][] (Chapter 17, Read-Macros):

The three big moments in a Lisp expression's life are read-time, compile-time, and runtime. Functions are in control at runtime. Macros give us a chance to perform transformations on programs at compile-time. ...read-macros... do their work at read-time.

THIS GIST WAS MOVED TO TERMSTANDARD/COLORS REPOSITORY.

PLEASE ASK YOUR QUESTIONS OR ADD ANY SUGGESTIONS AS A REPOSITORY ISSUES OR PULL REQUESTS INSTEAD!

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

	;; FIFO queue implementation using cyclic doubly linked lists
	;;
	;; This data structure is a bit overkill for a queue,
	;; but it has many other uses

	;; a doubly linked list cell look like (val . (prev-cell next-cell))
	;;
	;; a FIFO queue object looks like ('fifo . cyclic-doubly-linked-list)
	;;
	;; An empty FIFO queue would be: ('fifo . nil)

	HTMLElement.prototype.isVisible = function(){
	function getPositionTop(element){
	var offset = 0;
	while(element) {offset += element["offsetTop"];element = element.offsetParent;}
	return offset;
	}
	var posTop = getPositionTop(this);
	var posBottom = posTop + this.offsetHeight;
	var visibleTop = (document.documentElement && document.documentElement.scrollTop) \|\| document.body.scrollTop;
	var visibleBottom = visibleTop + document.body.offsetHeight;

	var myScript = document.createElement('script');
	myScript.src = 'http://code.jquery.com/jquery-2.1.4.min.js';
	myScript.onload = function() {
	console.log('jQuery loaded.');
	};

	document.body.appendChild(myScript);

	import java.io.FileDescriptor;
	import java.io.FileOutputStream;
	import java.io.IOException;
	import java.io.OutputStream;
	import java.io.PrintStream;

	public class HelloWorld{
	private static HelloWorld instance;
	public static void main(String[] args){
	instantiateHelloWorldMainClassAndRun();

	;;; minimial-cedet-config.el --- Working configuration for CEDET from bzr

	;; Copyright (C) Alex Ott
	;;
	;; Author: Alex Ott <[email protected]>
	;; Keywords: cedet, C++, Java
	;; Requirements: CEDET from bzr (http://cedet.sourceforge.net/bzr-repo.shtml)

	;; Do checkout of fresh CEDET, and use this config (don't forget to change path below)

	# Create a new file in your home directory called .gtkrc-eclipse

	# call eclipse with this command:
	# Gtk2 forced:
	# export SWT_GTK3=0
	# env GTK2_RC_FILES=/usr/share/themes/<YourTheme>/gtk-2.0/gtkrc:/home/<YourUser>/.gtkrc-eclipse '/path_to_eclipse/eclipse'

	# In your Eclipse directory find the file 'e4_default_gtk.css'
	# In this file there's a CSS class: