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PHP 7 Data Structures and Algorithms

You're reading from   PHP 7 Data Structures and Algorithms Implement linked lists, stacks, and queues using PHP

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Product type Paperback
Published in May 2017
Publisher Packt
ISBN-13 9781786463890
Length 340 pages
Edition 1st Edition
Languages
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Author (1):
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Mizanur Rahman Mizanur Rahman
Author Profile Icon Mizanur Rahman
Mizanur Rahman
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Table of Contents (14) Chapters Close

Preface 1. Introduction to Data Structures and Algorithms FREE CHAPTER 2. Understanding PHP Arrays 3. Using Linked Lists 4. Constructing Stacks and Queues 5. Applying Recursive Algorithms - Recursion 6. Understanding and Implementing Trees 7. Using Sorting Algorithms 8. Exploring Search Options 9. Putting Graphs into Action 10. Understanding and Using Heaps 11. Solving Problems with Advanced Techniques 12. PHP Built-In Support for Data Structures and Algorithms 13. Functional Data Structures with PHP

Interpolation search

In binary search algorithm, we always start with the middle of the array to start the searching process. If an array is uniformly distributed and we are looking for an item, which, may be close to the end of array, then searching from the middle might not sound like a good choice to us. Interpolation search can be very helpful in such cases. Interpolation search is an improvement over binary search algorithm. Interpolation search may go to different location based on the value of the searched key. For example, if we are searching a key that is close to the beginning of the array, it will go to the first part of the array instead of starting from the middle. The position is calculated using a probe position calculator equation, which looks like this:

pos = low + [ (key-arr[low])*(high-low) / (arr[high]-arr[low]) ]

As we can see, we are going from our generic...

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