EGreg

	/*
	 * Creates a callback to be called after multiple functions are done
	 * Usage:
	 * var p = Q.pipe(function (params, subjects) {
	 *   // arguments that were passed are in params.user, params.stream
	 *   // this objects that were passed are in subjects.user, subjects.stream
	 * }, ['user', 'stream]);
	 * mysql("SELECT * FROM user WHERE user_id = 2", p.fill('user'));
	 * mysql("SELECT * FROM stream WHERE publisher_id = 2", p.fill('stream'));
	 *

EGreg

	/*
	 * Sets up control flows involving multiple callbacks and dependencies
	 * Usage:
	 * var p = Q.pipe(function (params, subjects) {
	 *   // arguments that were passed are in params.user, params.stream
	 *   // this objects that were passed are in subjects.user, subjects.stream
	 * }, ['user', 'stream]);
	 * mysql("SELECT * FROM user WHERE user_id = 2", p.fill('user'));
	 * mysql("SELECT * FROM stream WHERE publisher_id = 2", p.fill('stream'));
	 *

EGreg

This is the most open letter ever. Other authors claim their letters are "open" because you can all read them, but in reality, they are nothing but the rants of one person, which you might not even completely agree with, or will piss you off.

By contrast, this letter is truly open and gives you the freedom to fork and modify it. Pissed about Mike Arrington investing? Want to give Richard Stallman some personal advice to stop publicly mentioning conspiracy theories he  may or may not believe in? The choice is yours. Simply fork this letter and post it on Hacker News and other places. Track its changes, and see what happens.

Anything you wanted to write about lately?

--- THE THREE LINES ---
This letter is licensed under the GNU Public License. http://www.gnu.org/licenses/gpl.html
You may fork it but you must include these three lines exactly as they appear at the bottom of the letter.

EGreg

// asynchronous version
asynchronousCache.get("id:3244", function(err, myThing) {
  if (myThing == null) {
    asynchronousDB.query("SELECT * from something WHERE id = 3244", function(err, myThing) {
      // We now have a thing from DB, do something with result
      doSomething(myThing);
    });

  } else {
    // We have a thing from cache, do something with result

EGreg

// Illustrative case
// YEAH -- ILLUSTRATIVE OF THE FACT THAT YOU CAN ISSUE PARALLEL QUERIES TO THE DATABASE INSTEAD OF SERIAL ONES LIKE A DUMB THREADED IMPLEMENTATION THAT IS INFERIOR FOR DOING WEB SERVERS

function (recentBlogPostIds, callback) { // obviously you need this, but use callback instead of return

var results = {};
var count = 0;

for (var i = 0; i < recentBlogPostIds.length; i++) {
  var blogPostId = recentBlogPostIds[i];

EGreg

/**
 * Mixes in one or more classes. Useful for inheritance and multiple inheritance.
 * @param A Function
 *  The constructor corresponding to the "class" we are mixing functionality into
 *  This function will get the following members set:
 *  __mixins: an array of [B, C, ...]
 *  constructors(subject, params): a method to call the constructor of all mixing classes, in order. Pass this to it.
 *  staticProperty(property): a method for getting a property name
 * @param B Function
 *  One or more constructors representing "classes" to mix functionality from

EGreg

SERVER SIDE:

========================= classes/Chess.php =====================

// MODEL ON SERVER

class Chess extends Base_Chess // here's one particular table
{
  function makeMove($e)
	{

EGreg

live server:

> hg pull
> hg branch
default
> hg merge develop
36 files updated, 0 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
> hg ci -m "merged develop - should fix the bugs"
created new head (!?)

EGreg

[root@li226-103 Q]$ hg strip 2970
saved backup bundle to /live/Q/.hg/strip-backup/d81bd91d5db2-backup.hg
Started to generate API documentation
[root@li226-103 Q]$ hg log | head
2970[tip]:2967,2969   3c779bf0f46f   2013-03-21 10:25 -0400   gregory
  merged develop - hopefully this will fix the bugs

2969   417d2a852997   2013-03-21 04:28 +0400   dmitriy
  Removed 'behavior' css3pie property from css rules and made separate UI-ie.css files with that 'behavior' property.

EGreg

<?php

/**
 * @module Db
 */

class Db_Mysql implements iDb
{
	/**
	 * This class lets you create and use PDO database connections.