Collect image files from your api into your flutter app About a week or two ago, I heard about the python qrcode library for the first time in a Harvard cs50 lecture. Though I was really impressed by how easy the library was to use, all I could think of…

Solving this LeetCode coding problem with a “whirling” algorithm Problem: We are playing a Guess Game. The game is as follows: I pick a number from 1 to n. You have to guess which number I picked. Every time you guess wrong, I will tell you whether the number I…

Differentiating the cost function in logistic regression The above figure is the general equation for gradient descent. To implement this algorithm, one requires a value for the learning rate and an expression for a partially differentiated cost function with respect to theta. …

Solving this LeetCode coding problem with math Problem: You are climbing a staircase. It takes n steps to reach the top. Each time you either climb 1 or 2 steps. In how many distinct ways can you climb to the top. After reading the problem for the first time, one…

An algorithm for finding the abnormals Before you begin this post, please check out my previous post, “How many triangles.” This post is a continuation of that post and you’ll need to have read that one to better understand this one. In my previous post, I discussed a mathematical formula…

A generalized formula for this famous math problem: How many triangles can be formed by connecting the dots in figure 1? Hold on. You definitely don’t want to draw every one of the 76 possible triangles: I’m not even sure if that’s achievable. Let’s try out something smarter, math ^_^ The solution to the problem …

Place each of the digits 1,2,3,4,5,6,7 and 8 in separate boxes so that boxes that share common corners do not contain successive digits. I’m sure more than half of you reading this have tried solving the puzzle above. If you were able to, bravo! Keep reading to see an algorithm…

Several weeks ago, I stumbled on my first linked list problem on Leetcode: it was my first time hearing of linked lists. I left the problem unsolved (obviously) and started learning about my newly found data structure. Initially, it appeared to me as a “try-hard” type of array, because most…

A few days ago, a friend sent me a math problem she had received from another friend of hers. At a first glance, this mensuration problem looked quite simple but apparently, “it wasn’t as easy as it looked,” she said. …