Seating permutations - take a list of people and it gives you all possible seating arrangements

gistfile1.txt

let seating = (people) => {

  let result = [];

  (function permutations (left, right) {

    let current;
    let before
    let after;

    if (right.length <= 1) {
      result.push(left.concat(right));
      return;
    }

    for (let i = 0; i < right.length; i++) {
      current = right.slice(i, i + 1);
      before = right.slice(0, i);
      after = right.slice(i + 1, right.length);
      permutations(left.concat(current), before.concat(after));
    }

  }([], people));

  return result;

};