function seed() { return Array.prototype.slice.call(arguments); } function same([x, y], [j, k]) { return x === j && y === k; } // The game state to search for `cell` is passed as the `this` value of the function. function contains(cell) { return this.some(c => same(c, cell)); } const sum = ([x, y], [j, k]) => [x + j, y + k]; const getNeighborsOf = ([x, y]) => { const neighborDeltas = [ [-1, 1], [0, 1], [1, 1], [-1, 0], /* */ , [1, 0], [-1, -1], [0, -1], [1, -1] ]; return neighborDeltas.map((d) => sum(d, [x, y])); } const livingNeighbors = getLivingNeighbors(cell, state); return ( livingNeighbors.length === 3 || contains.call(state, cell) && livingNeighbors.length === 2); } const corners = (state = []) => { const xs = state.map(([x, _]) => x); const ys = state.map(([_, y]) => y); return { topRight: [Math.max(...xs), Math.max(...ys)], bottomLeft: [Math.min(...xs), Math.min(...ys)] }; }; const calculateNext = (state) => { const { bottomLeft, topRight } = corners(state); let result = []; for (let y = topRight[1] + 1; y >= bottomLeft[1] - 1; y--) { for (let x = bottomLeft[0] - 1; x <= topRight[0] + 1; x++) { result = result.concat(isAlive([x, y], state) ? [ [x, y] ] : []); } } return result; }; const printCell = (cell, state) => { return contains.call(state, cell) ? 'x' : '_'; }; const printCells = (state) => { const { bottomLeft, topRight } = corners(state); for (let y = topRight[1]; y >= bottomLeft[1]; y--) { let row = []; for (let x = bottomLeft[0]; x <= topRight[0]; x++) { row.push(printCell([x, y], state)); } console.log(row.join('')); } }; exports.seed = seed; exports.same = same; exports.contains = contains; exports.sum = sum; exports.getNeighborsOf = getNeighborsOf; exports.getLivingNeighbors = getLivingNeighbors; exports.isAlive = isAlive; exports.corners = corners; exports.calculateNext = calculateNext; exports.printCell = printCell; exports.printCells = printCells;

Estoy recibiendo un error.

En este proyecto, construirá una simulación bidimensional simple de células vivas, conocida como el Juego de la vida de Conway. En el proceso, aprenderá todo sobre las funciones de JavaScript, incluido lo que puede hacer con ellas y sus muchas características.