DAY9:Friend or Foe?


Posted by birdbirdmurmur on 2023-07-22

題目連結:

Friend or Foe?

解法:

function friend(friends){
  const friend = friends.filter(name => name.length === 4);
  return friend;
}

筆記:

解題時用的變數名稱好像不太好XD
看到別人直接return friends.filter
這樣可以更簡潔一點
我後面使用箭頭函數也方便了很多
玩陣列的其中一個方法filter
filter可以做一次快篩
並直接取代原本的陣列
這樣可以少設一個空陣列


#javascript #Codewars #filter







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