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@troelskn
troelskn / gist:1287893
Created October 14, 2011 18:24
Luhn's algorithm in php
<?php
function is_valid_luhn($number) {
settype($number, 'string');
$sumTable = array(
array(0,1,2,3,4,5,6,7,8,9),
array(0,2,4,6,8,1,3,5,7,9));
$sum = 0;
$flip = 0;
for ($i = strlen($number) - 1; $i >= 0; $i--) {
$sum += $sumTable[$flip++ & 0x1][$number[$i]];
@ShirtlessKirk
ShirtlessKirk / luhn.js
Last active May 17, 2024 08:05
Luhn validation algorithm
/**
* Luhn algorithm in JavaScript: validate credit card number supplied as string of numbers
* @author ShirtlessKirk. Copyright (c) 2012.
* @license WTFPL (http://www.wtfpl.net/txt/copying)
*/
var luhnChk = (function (arr) {
return function (ccNum) {
var
len = ccNum.length,
bit = 1,
@adrienne
adrienne / gist:3180103
Created July 26, 2012 03:38
Haversine formula (PHP/MySQL)
/**
* Generates the string for the Haversine function. We assume that the `zipcode`, `latitude`,
* and `longitude` columns are named accordingly. We are also not doing much error-checking
* here; this is a simple text cruncher to make things prettier.
* We may also be integrating some extra SQL in, passed in via the $extra parameter
*
* @param string $table The table to search in
* @param float $lat The latitude part of the reference coordinates
* @param float $lng The longitude part of the reference coordinates
* @param int $radius The radius to search within
@iros
iros / API.md
Created August 22, 2012 14:42
Documenting your REST API

Title

<Additional information about your API call. Try to use verbs that match both request type (fetching vs modifying) and plurality (one vs multiple).>

  • URL

    <The URL Structure (path only, no root url)>

  • Method:

@kgates-github
kgates-github / PascalsTriangles.js
Last active May 6, 2020 07:52
Two ways to create a Pascal's Triangle in JavaScript.
var numTiers = 100,
triangle,
start,
stop;
/**
*
* First version uses recursion
*
*/
@clouddueling
clouddueling / routes.php
Created February 27, 2013 22:48
username in url laravel
Event::listen('404', function()
{
$username = URI::segment(1);
$user = User::where_username($username)
->where_type('account')
->first();
if ($user != null) {
if ($user->username != '') {
@msurguy
msurguy / eloquent.md
Last active February 8, 2022 03:13
Laravel 4 Eloquent Cheat Sheet.

Conventions:

Defining Eloquent model (will assume that DB table named is set as plural of class name and primary key named "id"):

class Shop extends Eloquent {}

Using custom table name

protected $table = 'my_shops';

@asugai
asugai / Install composer on Amazon AMI running on EC2
Last active May 14, 2024 15:14
Install composer on Amazon AMI running on EC2
$ cd ~
$ sudo curl -sS https://getcomposer.org/installer | sudo php
$ sudo mv composer.phar /usr/local/bin/composer
$ sudo ln -s /usr/local/bin/composer /usr/bin/composer
then you can run
$ sudo composer install
@hofmannsven
hofmannsven / README.md
Last active May 3, 2024 15:30
Git CLI Cheatsheet
@msurguy
msurguy / List.md
Last active April 30, 2024 15:14
List of open source projects made with Laravel

Other people's projects:

My projects (tutorials are on my blog at http://maxoffsky.com):