https://www.pbainbridge.co.uk/2022/12/sort-through-array-of-duplicates.html

Sort through an array of duplicates.gs

/*
Sort through an array and remove any duplicate values.
Does not account for changes in case-sensitivity.
*/


function removeDuplicates() {

  // array of duplicates
  var rawArray = ['Dave', 'Jim', 'Dave', 'Nicky', 'Nicky', 'Bob', 'Bob', 'Bob'];
  Logger.log(rawArray);

  // sort the array alphabetically so they are organised in the end
  rawArray.sort();

  // empty array for single values
  var cleanArray = [];


  // loop through each element of the array of duplicates *******************
  rawArray.forEach(function checkDuplicates(name) {

    // log current name in array of duplicates
    Logger.log(name);

    // perform an 'include' method check
    var exists = cleanArray.includes(name);
    Logger.log(exists);


    // check if name exists in empty array for single values
    if (!exists) {

      // does not exist, push into empty array
      cleanArray.push(name);

    }
    else {
      // does already exist, do nothing
    }


  });
  // loop through each element of the array of duplicates *******************


  // log single values array
  Logger.log(cleanArray);

}