Jeka

Jeka is project inspired by Karel.

Karel is an educational programming language for beginners, created by Richard E. Pattis in his book Karel The Robot: A Gentle Introduction to the Art of Programming.

What is Jeka

Jeka is friendly dog that lives in an environment consisting of a grid of streets (left-right) and avenues (up-down). Jeka understands basic instructions:

• moveForward: Jeka moves by one square in the direction he is facing
• turnLeft: Jeka turns 90 ° left
• woof: Jeka barks at you (friendly)
• frontIsClear: Jeka tells you if you can move forward in the facing direction
• hasBones: Jeka tells you if there is a bone on the current position
• putBone: Jeka puts a bone on the square he is standing at
• pickBone: Jeka picks a bone from the square he is standing at

How does Jeka work?

Jeka has 4 main modules:

• Mustang (custom language interpreter that takes the code you write and translates it to the commands known to Jeka)
• BoardController (module that takes care of drawing Jeka, Jeka's World and Jeka's moves)
• Engine (module that is responsible for connecting Mustang and BoardController
• CodeController (module that takes care of getting user's input to the Engine)

Demo Code

Valid Jeka code example (success of running directly this code depends in the Jeka's World)

moveForward();
turnLeft();

fun turnRight(){
  turnLeft();
  turnLeft();
}

var i = 0;

while(i < 5){
  turnRight();
  i = i + 1;
}

while(frontIsClear()){
  moveForward();
}

while(hasBones()){
  pickBone();
}

putBone();

turnRight();

Running Locally

In the project directory, you can run:

npm start

Runs the app in the development mode on port: 3000.

npm run ts

Typescript check.

npm run build

Builds the app for production to the build folder.