Section 2.1: Extract Unique Elements from an Array

To obtain an array devoid of duplicates, you can utilize a straightforward method. By forming a Set from the original array and converting it back to an array using the spread operator, you can easily filter out repeated values.

Section 2.2: Generate Random Booleans

This function returns either true or false, each with a 50% likelihood. It leverages Math.random to produce a random number between 0 and 1, subsequently evaluating if the number is greater or less than 0.5.

Section 2.3: Random Number Generation

You can create a function to generate a random number within a specified range, defined by minimum and maximum values.

Section 2.4: Swapping Variables

Did you know it's possible to swap two variables without using a temporary variable? This can be accomplished neatly in a single line of code.

Section 2.5: Scroll to Top Functionality

Using the scrollTo(x, y) function, you can effortlessly navigate to specified coordinates, with the top coordinates set at (0,0).

Section 2.6: Calculating Averages

You can create a getAverage function utilizing the Array.prototype.reduce() method to compute the average of numerical values in an array.

Section 2.7: Counting Characters in a String

Section 2.8: Retrieving Selected Text on a Webpage

You can leverage a built-in browser method to capture the text that users select on a webpage.

Section 2.9: Cloning Arrays

There are multiple methods to clone an array; here are my two preferred techniques.

Section 2.10: Counting Value Occurrences in an Array

You can count how many times a particular value appears in an array using the array.filter method.

Section 2.11: Palindrome Check

A palindrome is a string that reads the same forwards and backwards.

Section 2.12: Generating Random Hex Colors

Section 2.13: Capitalizing Strings

If you prefer not to use CSS for capitalizing strings, you can achieve this with a simple one-liner.