Concept

Immutability

Comparator

Memoization

Generator

Programming language

Merge sort

Function

Logical equivalence

sort() does not work

Sort Numbers

What's a square number?

My answer is too long

Breaking the problem down

Performance

Find the fewest square numbers that sum to a target.

Min Squares

Leaf node

Heapsort

Given a 2d matrix where 1 represents land and 0 represents water, return the number of square islands.

Count Square Islands

What do I do with duration?

Linear time approach

sort() by numbers doesn't work

Determine if there are enough meeting rooms available.

Meeting Rooms

Reactive programming

Use native sort

Lowercase strings before uppercase

Sort an array of strings while ignoring case.

Caseless String Sort

Postorder traversal

Algorithm

Data structure

JavaScript

Boolean algebra

Queue

Greedy

Binary search

Consider all possibilities

What is my base case?

dice=2, faces=3, target=3 permutations explained

Find the number of ways to roll dice to get a target value.

Ways to Roll Dice

Computer Science

Logical not

Set API

Subtract logic

Set Subtraction

Preprocessing

Knapsack

Array

Timsort

Don't modify args

Merge the counts of each key from two maps.

Merge map counts

Working with objects

Return a shallow copy of an object with the specified keys removed.

Pluck object values

Primitive

Self-balanced tree

Bubble sort

Approach

Determine if two arrays are permutations of each other.

Permutation Check

Discrete math

Permutation

Programming paradigm

Prolog

Fibonacci Series Explained

Calculating the Nth term

Fibonacci

Union logic

Set Union

Quicksort

Logical inclusive or

Math operators

Format Duration

Breadth first search

Useful string functions

Template strings and whitespace

Convert a string to a 2d array of numbers.

Matrix Parsing

Recursive Approach

Recursion visualized

Recursive skeleton

Iterative approach

Powerset

Iterable Protocol

Binary search tree

Hash function

Heap

Logical and

Value

Intersect Logic

Set Intersection

Combination

What's a prime number?

Checking for primes

Prime Factors

Sentinel node

Divide and conquer

Convert an object to an array of its values.

Object to array

Dynamic programming

Merge the counts of each key from two objects.

Merge object counts

How queens move

Count positions with N queens on an NxN board where no queen can attack another.

N Queens

Iterator

Scenario

Given sound event metadata find all sound files to preload.

Preload Sounds

Combinatorics

Skip list

Logical implication

Todo

Caching

Insertion sort

Spread operator

Destructuring

Find all permutations of characters in a string.

Make Permutations

What's an acronym?

Easy Parsing

Ignored Words

Acronym

Circular reference

Tree

Suggested functions to parse key-value pairs

Fixing regressions

How to type check

Long arrays

Defaulting to true: Fix false positives

Additional Features

Parse the query string. There's a few tricky features here.

Query Strings

Procedural programming

Object oriented programming

Base case

Reference

Flood Fill

Hash table

Pluck map values

Top Games

Inorder traversal

Doubly-linked list

Selection sort

Decrease and conquer

Graph

Range Generator

Set Exclusive Or

Hash

Brute force

Dynamic array

Root node

Stack

Pointer

Falsy

String

Date

Node

Binary tree

WeakSet

Iterable

Graph traversal pattern

Anagrams

Preorder traversal

WeakMap

Sort stability

Array to object

Non-repeating Char

Logical exclusive or

Array-like

iterative

copy-and-remove

add-only

count

sort-and-stringify

backtrack

bitmask

construct

Truthiness

Tail recursion

Red-black tree

Object

Array to map

Recursion

Order by occurrences

Functional programming

Depth first search

Backtracking

Number

Trie

Linked list

Imperative programming

First to appear K times

Pure function

Mathematics

AVL tree