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This is my perspective about Leadership. I have joined many companies so far and I do understand that Leadership is a very important factor making impacts to the company's culture. So why I said th...
Performance SQL Best Practices
If we work on a complex system, queries are pretty complex with a ton of subqueries, we would encounter the problem of optimization of query. In order to achieve a goal, we have many ways to do. So...
MERN Stack Javascript Problem Solving AngularJS
Below is Angular code but you can do it simple, just focusing on the encodeURIComponent. Read the link below to get to know the reason. get html() { return this.viewTrustDocx; } private get viewTr...
Actually, in my opinion there is nothing best. Anything has its own advantages and disadvantages. It depends on the context we apply the proper technology, design patterns, best practices etc. Some...
Observer The Observable pattern is one that allows an object, called subject, to keep track of other objects, called observers, interested in the subject state. When the subject state changes, it n...
Have you ever heard Template Method pattern? We thought we know it but we might be wrong. I just found a secret, a meaning of this pattern. Template method supported by inheritance. So what is temp...
Requirement: Check if the input string has balanced chars. More details please have a look at the "Result" section below. This a an interview challenge in "XYZ" company. 1. Solution. I apply single...
1. Searching the products which have duplicated names. Product.select("name, count(*) as num").group(:name).having("num > 1") SELECT name, COUNT(*) FROM products GROUP BY name HAVING COUNT(*) &g...
This is a challenge from "XYZ" company. My solution is using message queue for "POST". For "GET", it's just a challenge, not applying in real project. Because pub/sub system would be better than de...
Software Architecture Best Practices Performance
Rabbitmq and Sneakers would bring to us a ton of benefits. That is one of many solution for improving performance by placing synchronous work into a background work asynchronously. However, we can ...