“Given the root of a binary tree, we will check whether the binary tree is a mirror of itself (i.e., symmetric around its center).” -LeetCode Example 1:

Problem 1: Second Highest Salary The problem states: “Write the SQL query from the Employee Table to compute the second highest salary” +----+--------+ | Id | Salary | +----+--------+ | 1 | 100 | | 2 | 200 | | 3 | 300 | +----+--------+ In the case above we…

Solving this medium level leet code problem was frustrating to say the least. After learning how to solve such problem, I can explain how to approach such problem. The problem: Given the root of a binary tree, determine if it is a valid binary search tree (BST). A valid binary…

Continuing on with building out the backend for our Picgram web app, I added the following to the Sessions Controller: class SessionsController < Devise::SessionsController # is where a user will authenticate his/her credentials and it will assign the JWT to the user if successful. def create user = User.find_by_email(sign_in_params[:email]) if…

Some Flatiron School colleagues and myself decided to work on a group project in order to continue to flex our programming muscles! We decided to create a Instagram web application clone and add some features of d3.js, devise, Oauth and more in order to have more experience using these tools. …

Problem 1: Recursive Digit Sum We are given the task to solve for the super digit, which is the digit that is sum of a longer digit. Our known variables are n and k, n represents the large number that is a string and k represents the total amount of…

I’ve been learning much about D3 and its usefulness this past week. In the course so far I was able to do week 1 with no problem since it was just a JavaScript refresher course. For the week 2 curriculum, I learned about writing the code to create bar charts…

I came across D3 when I was applying to a position at a media company and was asked in a code challenge to submit a bar chart with data that is within a csv file. Unfortunately I was unable to complete the challenge but it opened my eyes to what…

This week I will be going over a problem from Hackerrank. The problem is titled Birthday Cake Candles. 1)Birthday Cake Candles The problem reads: You are in charge of the cake for a child’s birthday. You have decided the cake will have one candle for each year of their total…