jscari

jscari / Luhn.js

Last active November 17, 2020 02:27

Luhn algorithm - generate / validate

	var Luhn = {
	// length of our number (check digit included)
	length: 10,
	pow2: [0, 2, 4, 6, 8, 1, 3, 5, 7, 9],
	// compute check digit
	checksum: function (x) {
	var sum = 0;
	var n;
	var odd = false;
	for (var i = x.length - 1; i >= 0; --i) {

jscari / gist:9e6d713e0125931699f7

Created December 10, 2015 16:30

Fast inserts with innoDB

	SET GLOBAL innodb_flush_log_at_trx_commit=2;
	//Make your inserts
	SET GLOBAL innodb_flush_log_at_trx_commit=1;

jscari / current_auto_increment.sql

Created December 10, 2015 16:23

Get the current auto_increment value for any table in Mysql

SHOW TABLE STATUS FROM `DatabaseName` LIKE 'TableName' ;

jscari / clearTimeouts.js

Created November 30, 2015 19:07

Stop all timeouts in Javascript

	// Set a fake timeout to get the highest timeout id
	var highestTimeoutId = setTimeout(";");
	// clear all timeouts with an id between 0 and highestTimeoutId
	for (var i = 0 ; i < highestTimeoutId ; i++) {
	clearTimeout(i);
	}

jscari / gist:ad0a939341cb53d9f86b

Last active August 29, 2015 14:23

	/**
	A pseudo random integer between 0 and MAX_VALUE according to a number n,
	returns always the same pseudo random number when giving the same n and MAX_VALUE
	*/
	function pseudoRandomLCG(n, MAX_VALUE){
	var a = 25214903917; var c = 11;
	var m = Math.pow(2,32);
	var x = 0;
	for(var i = 0;i<n;i++){
	x = (a+x*c) %m;