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Computer Science Introduction to Algorithms Algorithms in Code Recursive Binary Search

Gabbie Metheny
Gabbie Metheny
33,709 Points

SOLUTION: JavaScript recursive binary search

I noticed in the notes following this video, there's a binary_search function for those following along in JavaScript, but no recursive_binary_search. Wanted to provide mine, just in case it helps anyone! And if you're a JS dev struggling with recursion, here's my favorite video on the subject, courtesy of Fun Fun Function :)

function recursive_binary_search(list, target) {
  if (list.length === 0) {
    return false;
  } else {
    let midpoint = Math.floor(list.length / 2);

    if (list[midpoint] === target) {
      return true;
    } else {
      if (list[midpoint] < target) {
        return recursive_binary_search(list.slice(midpoint + 1), target);
      } else if (list[midpoint] > target) {
        return recursive_binary_search(list.slice(0, midpoint), target);
      }
    }
  }
}

6 Answers

Nice! :+1:

Thanks