Tell us what’s happening:
Hi all, I need some help with this challenge.
I’m unsure what’s going on with the test cases for it, specifically testcases 3 and 4.
Test case 3 states: “createBoard([2, 10]) should return [[“X”, “O”, “X”, “O”, “X”, “O”, “X”, “O”, “X”, “O”], [“O”, “X”, “O”, “X”, “O”, “X”, “O”, “X”, “O”, “X”]]”
…which is incorrect, as the very last character in the first list matches the very first character in the second list, which goes against the instructions.
Any help would be appreciated.
Thank you!!
Your code so far
function createBoard(dimensions) {
let currCharacter = "X";
let board = [];
for (let i = 0; i < dimensions[0]; i++) {
let row = [];
for (let j = 0; j < dimensions[1]; j++) {
row.push(currCharacter);
currCharacter = (currCharacter === "X") ? "O" : "X";
}
board.push(row);
}
return board;
}
console.log(createBoard([3, 3])); // should return [["X", "O", "X"], ["O", "X", "O"], ["X", "O", "X"]].
console.log(createBoard([6, 1])); // should return [["X"], ["O"], ["X"], ["O"], ["X"], ["O"]].
console.log(createBoard([2, 10])); // should return [["X", "O", "X", "O", "X", "O", "X", "O", "X", "O"], ["O", "X", "O", "X", "O", "X", "O", "X", "O", "X"]].
console.log(createBoard([5, 4])); // should return [["X", "O", "X", "O"], ["O", "X", "O", "X"], ["X", "O", "X", "O"], ["O", "X", "O", "X"], ["X", "O", "X", "O"]]
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Challenge Information:
Daily Coding Challenge - Checkerboard
https://www.freecodecamp.org/learn/daily-coding-challenge/2025-12-18
