Code dojo pairing names

index.js

const people = ["TT", "ME", "FE", "TR", "JE", "DE", "AD"];

Array.prototype.group = group;

function group(size = 2, sizingFunc) {
  const tmp = this.slice();
  const output = [];
  
  while(tmp.length) {
    const groupSize = sizingFunc(tmp.length, size);
    output.push(tmp.splice(0, groupSize));
  }
  
  return output;
}

function groupWithUndersize(remaining, size) {
  return size;
}

function groupWithoutUndersize(remaining, size) {
  return remaining % size ? size+1 : size;
}

function predefinedGroupNumber(originalGroupSize, roundFunc) {
  return function(remaining, size) {
    return roundFunc(originalGroupSize / size);
  }
}

function randomSort() {
  return 0.5 - Math.random();
};

var groups = people.sort(randomSort).group(3, predefinedGroupNumber(people.length, Math.ceil));

console.log(groups);