Binary Search in Sorted Array
Binary Search in Sorted Array is a reusable JavaScript snippet. Efficiently finds the index of a target value in a sorted array using the binary search algorithm. O(log n) time complexity. The full implementation: function binarySearch(arr, target) { let left = 0 let right = arr.length - 1 while (left <= right) { const mid = Math.floor((left + right) / 2) const guess = arr[mid] if (guess === target) return mid if (guess < target) left = mid + 1 else right = mid - 1 } return -1 // Not found } // Find insertion index (for sorted insertion) function binaryInsertIndex(arr, target) { let left = 0 let right = arr.length while (left… This snippet uses only standard JavaScript with no dependencies, so it runs in modern browsers and Node.js alike. Browse more patterns in the snippet library, or paste the code straight into the playground to experiment with it.