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javascript関数ドリル 初級編uniq関数の実相のアウトプット

Last updated at Posted at 2020-09-10

uniq関数の課題内容

詳細はこちら
   ↓
https://js-drills.com/blog/without/

uniq関数の取り組む前の状態

uniqメソットがどんなものか分からない状態

uniq関数に取り組んだ後の状態

if( !uniqArray.includes(value) ) {
uniqArray.push( value );
}この発想がなかった

uniq関数の実装コード(答えを見る前)


function uniq(array) {
  const uniqArray = [];
  for(let i = 0; i < array.length; i++) {
    const value = array[i];
    if( !uniqArray.includes(value) ) {
      uniqArray.push( value );
    }
  }

  return uniqArray;
}

const numbers = [2, 1, 2];

console.log( uniq(numbers) );
// => [2, 1]

console.log( numbers );
// => [2, 1, 2]
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