# LeetCode 144. Binary Tree Preorder Traversal

Description https://leetcode.com/problems/binary-tree-preorder-traversal/description/ Given a binary tree, return the preorder traversal of its nodes’ values. For example: Given binary tree {1,#,2,3}, 1 \ 2…

# LeetCode 35. Search Insert Position

Description Given a sorted array of distinct integers and a target value, return the index if the target is found.…

# Machine Learning Coding Tutorial 5. Build Our Own Classifier

In this tutorial, we are going to write machine learning program with our own classifier. 1. Steps First, we need to…

# Machine Learning Coding Tutorial 4. Testing Accuracy

Machine Learning Coding Tutorial 4. Testing Accuracy In this tutorial, we are going to write a program testing machine learning…

# Machine Learning Coding Tutorial 3. What Makes a Good Feature?

Machine Learning Coding Tutorial 3. What Makes a Good Feature? In the previous tutorial, we used decision tree as the…

# Machine Learning Coding Tutorial 0. Environment Setup

Welcome to the 0th GoodTecher Machine Learning Coding Tutorial. The 0th tutorial is about getting your programming environment ready for…

# Machine Learning Coding Tutorial

Machine Learning Coding Tutorial Hello friends, Here is GoodTecher Machine Learning Coding Tutorial. GoodTecher will teach you machine learning concepts and…

# LeetCode 122. Best Time to Buy and Sell Stock II

Description https://leetcode.com/problems/best-time-to-buy-and-sell-stock-ii/description/ Say you have an array for which the ith element is the price of a given stock on day i. Design…

# What’s the difference between SCSS and Sass?

Question: What’s the difference between SCSS and Sass? Answer: There are two syntaxes available for Sass. The first, known as…

# Machine Learning Coding Tutorial 2. Visualizing a Decision Tree

In the previous tutorial, we used decision tree as the classifier. Decision Tree is an easy to read and understand…