DiegoSalazar

// Takes a credit card string value and returns true on valid number
function valid_credit_card(value) {
  // Accept only digits, dashes or spaces
	if (/[^0-9-\s]+/.test(value)) return false;

	// The Luhn Algorithm. It's so pretty.
	let nCheck = 0, bEven = false;
	value = value.replace(/\D/g, "");

	for (var n = value.length - 1; n >= 0; n--) {

arlg

/*FOR LOOPS
-------------------------------------------*/

//SLOW -> (no caching of the length)
for (var i = 0; i < myArray.length; i++) {}

//GOOD -> (caching the length) : http://jsperf.com/forloops3
for (var i = 0, l = myArray.length; i < l; i++) {}

//BEST -> backwards for loop + caching the length : http://jsperf.com/forward-and-backward-for-loops/2

imjasonh

* {
    font-size: 12pt;
    font-family: monospace;
    font-weight: normal;
    font-style: normal;
    text-decoration: none;
    color: black;
    cursor: default;
}

ipbastola

Safest way to clean up boot partition - Ubuntu 14.04LTS-x64, Ubuntu 16.04LTS-x64

Reference

Case I: if /boot is not 100% full and apt is working

1. Check the current kernel version

$ uname -r