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Author Archives: Yatin

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An experience full-stack engineer well versed with Core Java, Spring/Springboot, MVC, Security, AOP, Frontend (Angular & React), and cloud technologies (such as AWS, GCP, Jenkins, Docker, K8).

SQL Like Statement vs iLike

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Hello. In this tutorial, we will learn about the SQL like statement vs the ilike and we will use the PostgreSQL database running on Docker. 1. Introduction SQL stands for Structured Query Language and is used to extract and organize data stored in relational databases like MySQL, PostgreSQL, Oracle, etc. A relational database consists of rows and columns that allow ...

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-Xms and -Xmx parameter

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Hello. In this tutorial, we will understand Xms and Xmx parameters in the java programming language. 1. Introduction Heap space in java is the one created by the JVM when it starts and is slower than the stack memory. It is not thread-safe and is not automatically deallocated. It is used by the applications and it can be broken down ...

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SQL Subquery

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Hello. In this tutorial, we will learn subqueries in sql and will use the postgresql database. 1. Introduction SQL stands for Structured Query Language and is used to extract and organize data stored in relational databases like MySQL, PostgreSQL, Oracle, etc. A relational database consists of rows and columns that allow fetching specific information from databases that can be used ...

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Patch request – Spring boot

Hello. In this tutorial, we will create a simple restful spring boot application and understand the implementation of the patch endpoint request. 1. Introduction PATCH is used when we want to apply the partial update to the resource and does not want to update the entire resource. @PatchMapping annotation is used in spring for mapping the HTTP PATCH requests onto ...

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Send SMS – Twilio via Nodejs

Hello. In this tutorial, we will create a simple nodejs application for sending SMS with Twilio. 1. Introduction Sending SMS these days is handy as it is useful across various business use cases. For sending SMS via this nodejs application I will be using Twilio under a free tier account which offers limited support but should be good for our ...

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otp authentication node js

Hello. In this tutorial, we will create a simple node js application and implement an otp authentication login mechanism. Once the otp will be verified an access token will be generated that can be further used to access the secure api’s. 1. Introduction Authentication and authorization are the key features of any application. Authentication provides access while authorization specifies what ...

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javascript:void(0)

Hello. In this tutorial, we will create a simple HTML page and understand the use of the javascript:void(0). You can also check this tutorial in the following video: JavaScript Tutorial for Beginners – Video 1. Introduction 1.1 What is a Javascript It is lightweight object-oriented programming used for scripting HTML pages. It helps users to build modern applications by directly ...

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Python range() function

set python

Hello in this tutorial, we will understand the range() method in python programming. 1. Introduction to range() Python range() method is useful to generate an immutable sequence of numbers based on the given number. It is represented by the following syntax – Syntax range(start, stop[, step_size]) The method consists of 3 parameters – start: It defines the lower limit and ...

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CRUD operations in postgres jsonb

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Hello. In this tutorial, we will learn how to handle crud operations on a jsonb column in the postgres database. 1. Introduction SQL stands for Structured Query Language and is used to extract and organize data stored in relational databases like MySQL, PostgreSQL, Oracle, etc. A relational database consists of rows and columns that allow fetching specific information from databases ...

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Spring qualifier annotation

Hello. In this tutorial, we will create a simple hello world spring boot application and understand the usage of Qualifier annotation. 1. Introduction @Qualifer annotation in spring is used to identify beans of the same type. It is also used to annotate the custom annotations that behave as qualifiers. 2. Spring boot qualifier annotation Let us dive into some practice ...

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