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Web Technologies-I Deepak Mehta, Lovely Professional University

Notes Unit 7: Multidimensional Arrays

CONTENTS

Contents Objectives
Objectives 165 Introduction
7.1 Concept of Multidimensional Array
Introduction 166
7.1.1 Two-dimensional Arrays
7.1.2 Three-dimensional Arrays
7.2 Extracting Multiple Values
7.2.1 Slicing an Array
7.2.2 Splitting an Array into Chunks
7.2.3 Keys and Values
7.2.4 Checking whether an Element Exists
7.2.5 Removing and Inserting Elements in an Array
7.3 Converting between Arrays and Variables
7.3.1 Creating Variables from an Array
7.3.2 Creating an Array from Variables
7.4 Traversing Arrays
7.4.1 The for each Construct
7.4.2 The Iterator Functions
7.4.3 Using a for Loop
7.4.4 Calling a Function for each Array Element
7.4.5 Reducing an Array
7.4.6 Searching for Values
7.5 Sorting of Multidimensional Arrays
7.5.1 User Defined Sorts
7.5.2 Reverse User Sorts
7.6 Acting on Entire Arrays
7.6.1 Merging Two Arrays
7.6.2 Calculating the Sum of an Array
7.6.3 Filtering Elements from an Array
7.6.4 Calculating the difference between Two Arrays
7.7 Using Arrays
7.7.1 Stacks
7.7.2 Sets
7.8 Summary

7.9 Keywords
7.10 Review Questions
7.11 Further Reading

146 LOVELY PROFESSIONAL UNIVERSITY