This content originally appeared on DEV Community and was authored by xscoox
Today, I explored an important variation of binary search-the upper bound function. This is useful when we need to find the first element greater than a given value in a sorted array.
đź”· What is Upper Bound?
The upper bound of a target in a sorted array is the smallest index where an element greater than the target exists. If no such element exists, it returns the array length.
⚒️ Implementing Upper Bound in
TypeScript
Here's my TypeScript implementation using binary search:
đź“Ś What I Learned Today
âś… Upper Bound is useful for range queries, insertion positions, and ordered datasets.
âś… Binary Search makes it efficient with
O(log n) time complexity.
âś… Edge Cases are important, like when all
elements are ≤ target.
Feeling great about today's progress! Excited for more learning ahead 💡🔥
This content originally appeared on DEV Community and was authored by xscoox
xscoox | Sciencx (2025-02-20T17:27:09+00:00) 🚀Day 1 of #100DaysOfCode – Upper Bound with Binary Search in TypeScript. Retrieved from https://www.scien.cx/2025/02/20/%f0%9f%9a%80day-1-of-100daysofcode-upper-bound-with-binary-search-in-typescript/
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