Treasure Hunt

function treasureHunt(arr){
  let loot = arr.shift().split('|');

  for(let items of arr){

     if(items === 'Yohoho!'){
       break;
     }
     let treasure = items.split(' ');
     let command = treasure.shift();

     switch(command){
       case "Loot":
          for(let item of treasure){

            if(loot.indexOf(item)===-1){
              loot.unshift(item);
            }
          }
         ;break;
       case 'Drop':
          let ind = Number(treasure[0]);
          if(ind < 0 || ind >=loot.length){
            break;
          }
          let el = loot.splice(ind,1)[0];
          loot.push(el);
         ;break;
       case 'Steal':
          let count = Number(treasure[0]);
          let ind2 = loot.length - count;
          let steal = loot.splice(ind2,count);
          console.log(steal.join(', '));
         ;break;
     }
  }
  if(loot.length === 0){
    console.log('Failed treasure hunt.')
  }
    let sum = 0;
    for(let i = 0;i < loot.length;i++){
        sum += loot[i].length;
    }
    let averageGain = sum / loot.length;
    console.log(`Average treasure gain: ${averageGain.toFixed(2)} pirate credits.`)


}
treasureHunt([
'Gold|Silver|Bronze|Medallion|Cup',
'Loot Wood Gold Coins',
'Loot Silver Pistol',
'Drop 3',
'Steal 3',
'Yohoho!'
])