Uncategorized

In this post, we will understand how to use AWS CloudFront restricted access settings (signedCookies and signedURLs) to secure access to S3 objects. When we use S3 with CloudFront (and OAC), by default, all objects are publicly accessible over the internet. There is not control on who can access which object. Imagine a scenario, where … Read more

Spring is the season of nature’s greenery, blooming flowers, and buzzing insects. There are millions and trillions of species of flora and fauna. Often, we come across something mesmerizing but don’t know what it is! To solve this mystery, Spring Pokédex comes to the rescue. This blog post dives into how the Spring Pokédex works … Read more

In this tutorial, we will use AWS services to create a serverless application for a coffee shop. The user (coffee shop owner in this case) can authenticate using AWS Cognito and manage inventory (perform CRUD operations). Github Repo: https://github.com/TrickSumo/AWS-CRUD-Serverless Why Serverless? AWS-managed serverless services like Lambda, Cognito, and Api gateway scale down to zero when … Read more

Recently, Microsoft announced Majorana 1 quantum processor that uses topological conductor to create quantum computers that can scale to a million qubits. In this post, we will decode why there is so much hype around Majorana 1 and understand how it works using simple analogies. Quantum computers utilize phenomena of quantum mechanics (ie, superposition, entanglement, … Read more

Recently I faced a problem with AWS Cogntio JS SDK V3 for S3 buckets. While calling PutObjectCommand from SDK, an error occurs with the message TypeError: readableStream.getReader is not a function. On googling the error, I found this GitHub thread Angular 19 PutObjectRequest readableStream.getReader is not a function, where repo maintainers confirmed that the issue … Read more

AWS Cognito is a robust tool for implementing an authentication and authorization layer on your application. In this course, we will understand Cognito offerings (User Pool and Identity Pool), different ways to use Cognito with your application (OAuth2.0 and SDK), and at the end will use our learnings to create a secure file-sharing application (ShareMyFiles). … Read more

Half star pyramid is the most common pattern which we come across while writing code to print patterns in any language. Take a look at this pattern:- *************** One approach that might come to mind is “ the number of stars in each row is equal to the number of row (I mean index of … Read more

In this post, we will see the difference between pure functions and high-order functions in javascript. What are Pure Functions in Javascript? Functions which does not produce side effect are called pure function. This means that it does not depend on any external variable (like global). Also, it does not modify any external variable. Such … Read more

useState is one of the first hooks I came across while learning React. It is easy to understand/use but equally fascinating/confusing at the same time ( just on click of a button, things update on-screen 😮).  Let’s dive in!!! Why useState Hook? React does not detect change in normal variables that’s why useState hook is required. … Read more