In this article I will covering how to create custom filtering and sorting for Angular material table. I am assuming you already the know basics of Angular and JavaScript. If not please go through it and then come back to this article later. https://angular.io/docs https://javascript.info/ Okay, so let’s jump right…

Let’s imagine we have to create a service method which takes a list of search keys and returns a list of objects. If we start making Database calls in a loop for every search key and then aggregating the result to send it as a response. This will obviously be…

This is a sort article in which I will cover how can we sort an array of objects by multiple fields in Java using lambda function and in JavaScript using arrow functions. First let’s cover Java Let’s say we have an array of Employee objects. Where Employee is a class with two field (name…

Stack is very common and useful data structure which comes handy in dealing with many problems. In this article we will go through the pros and cons of using Stack class in Java and will explore if there are any alternatives to overcome the cons of Stack class. First of all let’s revise what is Stack? In computer…

This article is a part of Data structure and algorithm series. In this series I will try to explain important and tricky Data structure and Algorithm topics in detail. In this article I will cover Kahn’s algorithm for Topological sorting. Definition First let’s understand what is topology sorting anyway. define: topological…

In the age of Bot attacks almost all APIs published by major tech companies enforce some sort of rate limiting. In this article I will cover the implementation of Rate limiter using Redis Caching in Spring boot based on Fixed window counter algorithm. What is rate limiting? Rate limiting is a strategy for limiting…

In this article we will go through a JavaScript stub and try to understand it’s working in detail. Problem statement What will be the output for this stub? const func = () => { for (var i = 1; i < 5; i++) { setTimeout(() => console.log(i), 1000); } } func(); Answer Common incorrect answer Most…

People who have already used stream and Collectors might already know about this. But I did this a mistake recently which I wanted to share with you guys. If you already knew, I am hoping it will be a revision for you if not then you will learn something new. First of all what Collectors.toMap does? …

This article is a part of Data structure and algorithm series. In this series I will try to explain important and tricky Data structure and Algorithm topics in detail. In this article, I will cover three infamous Linked List problems Cycle detection Finding the starting point of the cycle if…