Credit card details are frequently used online and you may be wondering how a website checks if a card number is legitimate or not. During my CodeAcademy “Back-End Engineer” I have tackled the Credit Card Checker project which involves using the Luhn algorithm to check credit card numbers. Quoting Wikipedia (https://en.wikipedia.org/wiki/Luhn_algorithm#Description): “Each of the numbers … Continue reading Credit Card Number Checker (JavaScript)
I live in a part of the UK that has been under restrictions since March (with a few unrestricted weeks at the beginning of Summer) due to Coronavirus. When October kicked in my mood went a little bit bleaker as the light summer months had been and gone, darker days where setting in and sadly … Continue reading 30 Day Coding Challenge & Personal Update 2020
I have been given the opportunity to review "Eloquent JavaScript" (3rd Edition) by Marijn Haverbeke, published by No Starch Press. First in the interest of fairness and openness; No Starch Press has very kindly sent me a copy of the book for free. As my regular readers may have noticed, I really enjoy the books … Continue reading Eloquent JavaScript -Book Review (JavaScript)
Over its lifetime JavaScript has increased the ways that variables can be declared. I am going to take a brief look at the various methods I have come across so far that can be used. var test The var keyword declares a variable (in this case called test) which can later have its value changed/altered. … Continue reading Variables (JavaScript)
During winter 2017 I went through the process of using a Raspberry Pi, as a web server / looking at LAMP (Linux, Apache, MySQL, PHP). With my recent interest in JavaScript I have decided to look at installing Node.js on my Raspberry Pi. Node.js is a free open source environment for running JavaScript on a … Continue reading Installing Node.js (Raspberry Pi / JavaScript)
My original Countdown blog post mentioned that the JavaScript could be used to update content on a webpage (e.g. the countdown could countdown in real time and update on a page as it does so). I touched upon a method to do this, however I will expand a little bit on it here: // writes … Continue reading Updating Web Text Content (JavaScript)
I am revisiting my JavaScript Countdown to turn elements of it into JavaScript functions. A function allows for parts of code to be reused easily without having to recreate the segment of code every time it is needed. For example, below I have created a basic function that prints "Hello World!" and then called on … Continue reading Functions (JavaScript)
JavaScript has a function called Date() which can either return todays date (24th September 2018 as I write this) or be used to set a date. August 2019 has an important event for me, so I decided to use JavaScript to create a countdown that counts how many days are left until the 1st August … Continue reading Countdown (JavaScript)
I managed to finish my JavaScript console version of BlackJack which I started just over a week ago (see BlackJack V1). I got a little bit lost with the while looping and then needed to define how the player wins or loses but I think it now works as expected. // geektechstuff // BlackJack // … Continue reading BlackJack Part 2 (JavaScript)
Looking for a new project in JavaScript that I have not done in Python, I got to thinking about arrays. As JavaScript allows us to generate random numbers and store variables (see “Scissor, Paper, Stone”) it should allow me to also recreate the card game of Blackjack or 21. For more information on Blackjack please … Continue reading BlackJack Part 1 (JavaScript)
