Functional Snake Game - Part 2 - nextSnake

snake.js

const nextSnake = r.curry((cols, rows, state) => {
  return willCrash(cols, rows, state)
    ? initialState
    : {
        ...state,
        snake: willEat(nextHead(cols, rows, state), state.apple)
          ? [nextHead(cols, rows, state), ...state.snake]
          : [nextHead(cols, rows, state), ...r.dropLast(1, state.snake)],
      }
})