Each method (up, down, showStep) does not return any value, so they implicitly return undefined. After the first call, ladder.up() returns undefined, and chaining another .up() results in undefined.up ...

The player controls a snake that moves on a grid, eating food to grow longer. If the snake collides with the wall or itself, the game ends. The score increases as the snake eats more food. Built using ...

Think your WAF has you covered? Think again. This holiday season, unmonitored JavaScript is a critical oversight allowing attackers to steal payment data while your WAF and intrusion detection systems ...