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@lopspower
lopspower / README.md
Last active July 30, 2024 05:08
Hexadecimal color code for transparency

Hexadecimal color code for transparency

Twitter

How to set transparency with hex value ?

For example, you want to set 40% alpha transparence to #000000 (black color), you need to add 66 like this #66000000.

Download This sample on Google Play Store

@gokulkrishh
gokulkrishh / media-query.css
Last active July 28, 2024 17:25
CSS Media Queries for Desktop, Tablet, Mobile.
/*
##Device = Desktops
##Screen = 1281px to higher resolution desktops
*/
@media (min-width: 1281px) {
/* CSS */
@bodgit
bodgit / mod_proxy_wstunnel.c
Last active December 6, 2020 01:08
mod_proxy_wstunnel package for Apache on CentOS 6.x
/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software

Use apache2 with Passenger

Required

  • CentOS
$ cat /etc/redhat-release 
CentOS release 6.5 (Final)
  • gcc-c++
/*
* Original script by: Shafiul Azam
* Version 4.0
* Modified by: Luigi Balzano
* Description:
* Inserts Countries and/or States as Dropdown List
* How to Use:
In Head section:
@reu
reu / pub-sub.js
Created April 9, 2013 01:51
node.js redis pub-sub example
var redis = require("redis")
, subscriber = redis.createClient()
, publisher = redis.createClient();
subscriber.on("message", function(channel, message) {
console.log("Message '" + message + "' on channel '" + channel + "' arrived!")
});
subscriber.subscribe("test");

Transactions

As your business logic gets complex you may need to implement transactions. The classic example is a bank funds transfer from account A to account B. If the withdrawal from account A fails then the deposit to account B should either never take place or be rolled back.

Basics

All the complexity is handled by ActiveRecord::Transactions. Any model class or instance has a method named .transaction. When called and passed a block, that block will be executed inside a database transaction. If there's an exception raised, the transaction will automatically be rolled back.

Example

@tessro
tessro / redis-server
Created December 16, 2009 14:20
A CentOS initscript for Redis
#!/bin/sh
#
# redis - this script starts and stops the redis-server daemon
#
# chkconfig: - 85 15
# description: Redis is a persistent key-value database
# processname: redis-server
# config: /etc/redis/redis.conf
# config: /etc/sysconfig/redis
# pidfile: /var/run/redis.pid