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Computer Science Introduction to Algorithms Algorithms in Code Recursive Binary Search

Gabbie Metheny
Gabbie Metheny
33,778 Points
Posted by Gabbie Metheny
Gabbie Metheny
33,778 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

Alexander Davison
Alexander Davison
65,469 Points
Alexander Davison
Alexander Davison
65,469 Points

Nice! :+1:

Unsubscribed User
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Unsubscribed User
Full Stack JavaScript Techdegree Graduate 24,339 Points
Unsubscribed User
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Unsubscribed User
Full Stack JavaScript Techdegree Graduate 24,339 Points

Amazing! Thanks for sharing!!

Neri Brkt
PLUS
Neri Brkt
Courses Plus Student 268 Points
Neri Brkt
Neri Brkt
Courses Plus Student 268 Points

Thanks