Introduction to Arrays in Javascript |DSA in Javascript Course | Part 4

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Ever wondered how to master key JavaScript concepts and improve your coding skills? In this video, we dive into the core fundamentals of arrays—what they are, their interesting applications, and how to create and manipulate them in JavaScript. We'll also cover important topics like array indexing, comparing arrays with strings, and the Dutch National Flag (DNF) Algorithm, complete with a problem-solving walkthrough and dry run. Additionally, you'll learn about the for-of loop, basic objects, and how to add or remove key-value pairs in objects.

To put theory into practice, we’ll solve problems like counting string frequency and explore string interpolation with template strings. We'll also cover advanced techniques like higher-order functions, filters, reduce, and working with maps. By the end of the video, you'll have a solid understanding of how to handle arrays, objects, and more, enabling you to write cleaner, more efficient JavaScript code.

00:00 Introduction
02:08 What is array
14:02 Interesting application of arrays
19:42 How to create Arrays
24:00 Coding basic arrays in JS
27:50 Array indexing and comparison with strings
34:52 DNF Algorithm problem solving
55:06 DNF Algorithm dry run
56:58 for-of loop
01:02:02 Introduction to basic objects
01:08:15 Add or remove key value pairs
1:10:36 Count frequency of string - problem solving
1:22:55 Count frequency of string - Dry Run
1:25:15 String Interpolation or Template Strings
1:38:06 Object dot key values and entries
1:48:04 Unique - strings problem solving
1:50:53 Higher order functions
02:07:09 When to use maps
02:08:46 Getting index with maps
02:13:30 Making custom mapper
02:16:59 Filter functions
02:23:46 Reduce functions
02:31:15 Using Reduce

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