DAY17：A Needle in the Haystack

題目連結

A Needle in the Haystack

解法

function findNeedle(haystack) {
  return "found the needle at position " + haystack.indexOf("needle");
}

筆記

如何快速找到陣列中的索引？ indexOf()
直接返回字串

#javascript #Codewars #indexOf

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