How to useModulo Operation Approach in Javascript
In this approach, basically, we will use the modulo operation on the input-rotated array with respect to the 1st element of our array. The index where our modulo operation output becomes less will represent the rotation count.
Syntax:
a%b
Example: In this example, we will find the rotation count in a rotated sorted array using the Modulo Operation.
Javascript
function rotationCountUsingModuloOperation(arrInput) { let tempVar = arrInput.length; let minimumIndex = 0; let minimumValue = arrInput[0]; for (let i = 1; i < tempVar; i++) { if (arrInput[i] < minimumValue) { minimumValue = arrInput[i]; minimumIndex = i; } } var rotationCountValue = minimumIndex % tempVar; return rotationCountValue; } let inputArr = [6, 7, 8, 1, 2, 3, 4, 5] let output = rotationCountUsingModuloOperation(inputArr); console.log("Rotation Count is:", output); |
Rotation Count is: 3
Find the Rotation Count in Rotated Sorted array in JavaScript
Rotated Sorted Array is an array type in JavaScript that has been rotated to the left or right by some random number of positions. In this article, we will understand how to find the count of rotations performed on the original sorted array to obtain the given sorted array using JavaScript language. In this article, we will mainly cover three different approaches.
There are different approaches for finding the rotation count in a rotated sorted array in JavaScript. Let’s discuss each of them one by one.
- Using Recursive Approach
- Using Modulo Operation Approach
- Repeated Concatenation and Substring Approach
We will explore all the above methods along with their basic implementation with the help of examples.
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