Concept of Interpolation Search Algorithm in JavaScript | Learn JavaScript & Algorithms

Interpolation search algorithm is used to search for a target value in a sorted array. The algorithm takes advantage of the uniform distribution of the data in the array to find the target value more quickly than linear search. Interpolation search algorithm is improved version of binary search algorithm. In this video we look into Interpolation search algorithm.

Here's an example of the interpolation search algorithm implemented in JavaScript. Define a function that takes an array and a target value as input. This function will perform an interpolation search on a given sorted array to find the index of a target value. Initialize two variables 'low' and 'high' to 0 and 'array length - 1' respectively. Low and high will be used as the lower and upper bounds of the current subarray being searched.

Start a while loop that continues until either low is smaller than or equal to target or high is greater than or equal to target. Within the loop, calculate a guess position pos using formula in the video.

Use Math floor to calculate the index of the guess value in the array. If the guess value is equal to the target, return the index. If the guess value is greater than the target, update the high boundary.

If the guess value is less than the target, update the low boundary accordingly. At the end of loop, if the target is not found, return -1.

Define an array and a target value. Call the function with array and target value as arguments. It will log the result to the console.

So this is how we can implement Interpolation Search Algorithm in javascript.

* Binary Search Algorithm in JavaScript *
https://youtu.be/DdbCbc0VhMA

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It can be a good javascript interview question or frontend interview question. You may not be required to solve it on paper or whiteboard but the interviewer may ask you to give an idea on how to approach this algorithm. If you have an understanding of how to solve this problem or approach this algorithm, you will be able to answer it and get your next job as a frontend developer or full-stack developer.

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