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52 changes: 42 additions & 10 deletions 03week/towersOfHanoi.js
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Original file line number Diff line number Diff line change
Expand Up @@ -19,24 +19,56 @@ function printStacks() {
console.log("c: " + stacks.c);
}

function movePiece() {
// Your code here

function isLegal(startArray, endArray) {
let startLength = startArray.length-1;
let endLength = endArray.length-1;

if (endArray[endLength] == undefined){
return true;
} else if (startArray[startLength] < endArray[endLength]) {
return true;
} else {
return false;
}

}

function isLegal() {
// Your code here
function movePiece(startStack, endStack) {

let startLength = stacks[startStack].length;
let endLength = stacks[endStack].length;
let piece = stacks[startStack][startLength-1];

stacks[startStack].pop(piece)
stacks[endStack].push(piece)

}

function checkForWin() {
// Your code here
function resetGame() {
stacks = {
a: [4, 3, 2, 1],
b: [],
c: []
};

}

function checkForWin() {
if (stacks.c[0] == 4 && stacks.c[1] == 3 && stacks.c[2] == 2 && stacks.c[3] == 1){
console.log("winner");
resetGame();
}
}

function towersOfHanoi(startStack, endStack) {
// Your code here

//Legality check
let legal = isLegal(stacks[startStack], stacks[endStack])
if(legal){
movePiece(startStack, endStack)
}

checkForWin();
}

function getPrompt() {
Expand Down Expand Up @@ -80,7 +112,7 @@ if (typeof describe === 'function') {
});
describe('#checkForWin()', () => {
it('should detect a win', () => {
stacks = { a: [], b: [4, 3, 2, 1], c: [] };
stacks = { a: [], b: [], c: [4, 3, 2, 1] };
assert.equal(checkForWin(), true);
stacks = { a: [1], b: [4, 3, 2], c: [] };
assert.equal(checkForWin(), false);
Expand All @@ -91,4 +123,4 @@ if (typeof describe === 'function') {

getPrompt();

}
}