"use strict";

const sortCollectionBy = (collection, key) => {
  collection.sort((a, b) => {
    a = a[key].toLowerCase();
    b = b[key].toLowerCase();
    if (a < b) return -1;
    if (a > b) return 1;
    return 0;
  });
  return collection;
};

const arrayContains = (arr, user) => {
  let i = 0, count = arr.length, matchFound = false;

  for(; i < count; i++) {
    if (arr[i] === user) {
      matchFound = true;
      break;
    }
  }

  return matchFound;
};

exports.sortCollection = sortCollectionBy;
exports.arrayContains = arrayContains;