Queue Reconstruction by Height
Today's practice problem is queue reconstruction by height. Let's work it out.
Problem
Suppose you have a random list of people standing in a queue. Each...
Reverse String In-Place
Today’s practice algorithm question is to reverse string in-place. Another good practice for your problem-solving mindset.
Problem
Write a function that reverses a string. The input...
Load model using custom field in Magento 2
Beside loading model using primary ID field, we can also load model using custom field in Magento 2. I will show you how to...
Invert binary tree
Today’s practice algorithm question is to invert a binary tree. This is a very good problem to start learning with tree data structure; specifically,...
Update root password in MariaDB 10.4 on MacOS
There is some changes in authentication procedures in MariaDB 10.4, hence, you can not use previous techniques to change root password. I will show...
