utilities fn in js

utilitiesFn.js

/******************************
 * Arry unique
 ****************************** */
function arrUnique(arr){
  let len = arr.length;
  let newArr = [];
  for( let i=0; i < len; i++ ){
      if( newArr.indexOf(arr[i]) === -1){
        newArr.push(arr[i]);
      } 
  }
  return newArr;
}

function arrUnique(arr){
  let len = arr.length,
      temp,
      newArr=[];
      arr.sort();
      for( i=0; i< len; i++){
        if( temp !== arr[i]){
          newArr.push(arr[i]);
          temp = arr[i];
        }
      }
      return newArr;
}

function arrUnique(arr){
  let newArr = new Set(arr); // set is es6 function which return unique set
  return [... newArr]; // it's convert set to array
}