Sending Instructions from Earth to Rover on Mars using JavaScript. The ability to transmit and execute a sequence of commands to the rover is crucial for successful exploration

Question

Sending Instructions from Earth to Rover on Mars using JavaScript. The ability to transmit and execute a sequence of commands to the rover is crucial for successful exploration

I have completed iteration 1 of the Mars Rover program using JavaScript, which allows my rover to move in all directions within a 2-dimensional space (x,y). Now, I am moving on to iteration #2 where I need to give a series of commands to the rover and have them executed sequentially.

Can you provide some insights on how to approach iteration 2?

Here is the current code snippet I am working with:

// --------- Mars Rover Kata: Iteration #1 ------------ \\


// ------------------- User Experience via Console --------- \\

var promptSay = "Play with the Console!\nW = UP \nS = DOWN \nD = RIGHT \nA = LEFT";

var gridEdge = "You can't go there! \n\nPlease note that you are playing within an imaginary grid, and the farthest you can go is 9 steps.";

var wrongInput = "---WRONG INPUT!--- Please use correct input i.e.: \nW = UP \nS = DOWN \nD = RIGHT \nA = LEFT";

// Object Definition: (Vars inside a Var, may include functions)  \\

...

javascript arrays oop object javascript-objects

Answer 1

Answer №1

Interacting with the console is not possible in a browsing environment.

To achieve this functionality, you need to employ event listeners. One way to do it is by attaching them to the document body as shown in the example below:

const UP_ARROW = 38;
const LEFT_ARROW = 37;
const DOWN_ARROW = 40;
const RIGHT_ARROW = 39;

document.body.addEventListener("keydown", function(e) {
  let direction = null;

  switch(e.keyCode) {
    case UP_ARROW:
      direction = "up";
      break;
    case LEFT_ARROW:
      direction = "left";
      break;
    case DOWN_ARROW:
      direction = "down";
      break;
    case RIGHT_ARROW:
      direction = "right";
      break;
  }

  if (direction) {
    console.log("Arrow key " + direction + " was pressed!");

    moveRover(direction);
  }
});

Answer 2

Interacting with the console is not possible in a browsing environment.

To achieve this functionality, you need to employ event listeners. One way to do it is by attaching them to the document body as shown in the example below:

const UP_ARROW = 38;
const LEFT_ARROW = 37;
const DOWN_ARROW = 40;
const RIGHT_ARROW = 39;

document.body.addEventListener("keydown", function(e) {
  let direction = null;

  switch(e.keyCode) {
    case UP_ARROW:
      direction = "up";
      break;
    case LEFT_ARROW:
      direction = "left";
      break;
    case DOWN_ARROW:
      direction = "down";
      break;
    case RIGHT_ARROW:
      direction = "right";
      break;
  }

  if (direction) {
    console.log("Arrow key " + direction + " was pressed!");

    moveRover(direction);
  }
});

Sending Instructions from Earth to Rover on Mars using JavaScript. The ability to transmit and execute a sequence of commands to the rover is crucial for successful exploration

Answer №1

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