Hady Mahmoud l0gicpath

Creating a redis Module in 15 lines of code!

A quick guide to write a very very simple "ECHO" style module to redis and load it. It's not really useful of course, but the idea is to illustrate how little boilerplate it takes.

Step 1: open your favorite editor and write/paste the following code in a file called module.c

#include "redismodule.h"
/* ECHO <string> - Echo back a string sent from the client */
int EchoCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {

libevent vs libuv

Comparing libevent and libuv. My upfront biased: I want to like libevent. However, I want to objectively compare the two and make an informed decision.

What versions are we comparing?

libevent 2.0.22 (Stable) [2014-01-05]
libuv 1.8.0 (Stable) [2015-12-15]

Multiple MySQL Versions for Development

Options included below:

Using Docker docker-compose
Using Homebrew brew

Using Docker (recommended)

This gist was originally created for Homebrew before the rise of Docker, yet it may be best to avoid installing mysql via brew any longer. Instead consider adding a barebones docker-compose.yml for each project and run docker-compose up to start each project's mysql service.

2015-01-29 Unofficial Relay FAQ

Compilation of questions and answers about Relay from React.js Conf.

Disclaimer: I work on Relay at Facebook. Relay is a complex system on which we're iterating aggressively. I'll do my best here to provide accurate, useful answers, but the details are subject to change. I may also be wrong. Feedback and additional questions are welcome.

What is Relay?

Relay is a new framework from Facebook that provides data-fetching functionality for React applications. It was announced at React.js Conf (January 2015).

	import strutils
	import lists
	import re

	type
	Parser[T] = proc(input: string): Maybe[(T, string)]
	Maybe*[T] = object
	value: T
	hasValue: bool

	package main

	import (
	"log"
	"syscall"
	"unsafe"
	)

	var (
	kernel32 = syscall.NewLazyDLL("kernel32.dll")

	<?php

	Route::group([
	'prefix' => 'api/v1',
	'middleware' => ['api', 'auth:api']
	], function () {

	Route::get('/', function () {
	return Auth::guard('api')->user();
	});

	package main

	import (
	"bytes"
	"fmt"
	"io/ioutil"
	"mime/multipart"
	"net/http"
	)

	def intersects?(p0, p1, p2, p3)
	s1_x = p1[0] - p0[0]
	s1_y = p1[1] - p0[1]
	s2_x = p3[0] - p2[0]
	s2_y = p3[1] - p2[1]

	denom = s1_x * s2_y - s2_x * s1_y
	# if denom == 0 lines are parallel
	# TODO: aditional check if they overlap
	return false if (denom == 0)

	function getType(target){
	return Object.prototype.toString.call(target).slice(8, -1).toLowerCase();
	}