As the title says, I am trying to do form validation with credit cards and the Luhn formula. Any advice is appreciated.
function Luhn(luhn) {
// **** step1: double every other digit, starting at 0
var doubleDigits = [0, 2, 4, 6, 8, 1, 3, 5, 7, 9];
// **** step 2 + 3: any resulting value must be...
Skeet shooting is a recreational and competitive activity where participants, using shotguns, attempt to break clay disks automatically flung into the air from two fixed stations at high speed from a variety of angles.
Skeet is one of the three major disciplines of competitive clay pigeon shooting. The others are trap shooting and sporting clays. There are several types of skeet, including one with Olympic status (often called Olympic skeet or international skeet) and many with only national recognition.
General principles
For the American version of the game, the clay discs are ...
While the code is crisp and clean (COBOL always is .... ;-) ) I see some logic flaws in your computations.
Specifically, consider the current time 14450000 (2:45pm) and the user enters 15 for [HH] and 15 for [MM] as his ETA (3:15pm)
Your subtract will store the difference between 14450000 and 1...
I am looking at an outdated code written in rails 2.3, and feel that there should be a way to make it dry, decoupled, and look better, but cannot point out what it is yet.
class MyModelsController < ApplicationController
def edit
something = MyModel.find(params[:id])
return unless chec...
The infinite monkey theorem states that a monkey hitting keys at random on a typewriter keyboard for an infinite amount of time will almost surely type a given text, such as the complete works of William Shakespeare.
In this context, "almost surely" is a mathematical term with a precise meaning, and the "monkey" is not an actual monkey, but a metaphor for an abstract device that produces an endless random sequence of letters and symbols. One of the first instances of the monkey metaphor being used comes from French mathematician Émile Borel in 1913 but it may go back further than that....
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I recently went over to the Code Review beta site, and for some reason felt inclined to join one of their chat rooms.
Over the time I have chatted with them, I have learned a lot about the community over there, and feel that the chat experience is a huge part of acquiring a larger core community...
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Our main chat room is currently called Code Review General Room, with "General discussion about Code Review." for a description.
I propose The Zombie Hunters' Lounge, but I'd like the community to post their ideas here (1 per post, include why it's the best name), the one with the highest number...
public boolean delete(int d) {
Node tmpNode = head;
Node prevNode = null;
boolean deletedANode = false;
if (head == null) {
return deletedANode;
}
while (tmpNode != null) {
if (tmpNode.data == d) {
if (tmpNode == head) {
head =...
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I received this piece of code and this is horrible. I need your help to refactor this:
try
{
SomeOperation();
}
catch(IllegalArgumentException iaEx) {
try {
iaEx.printStackTrace();
} catch (Exception ex) {
ex.printStackTrace();
throw new CustomeExceptio...
