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Fix typo and rearrange comments in optional chaining example
Add note on generators
Document how console API can be used to visualize data structures like trees and graphs
Add note on labeled break statements
Make note of regexp method for pattern matching
Use nullish coalescing operator to assign default only if given value is null/undefined
Add note on object property names
Make note of the optional chaining operator
Make note of Date object
Make note of String.padStart
Make note of Math.abs and Math.sign
Note methods to convert a number to a string and vice versa
Add Math.random method
Add link to JSInfo tutorial on BigInt
Add note on iterating maps
Add note on the `Array` constructor
Add cautionary note on `arr.fill`
Use destructuring assignment to swap values
Note the exponentiation operator
Make note of the localeCompare method on strings
Add note on `arr.sort`
Add a couple of array & map methods
Refer to heap implementation in the lib folder
List methods that are helpful in processing a string character by character
Make note of second map contructor
Add links to the Leetcode discussion boards for heap-related problems
Document JS language features that are handy for solving problems