it's not about being the best it's about being better than yesterday
Problem Summary You’re given an integer array nums and a number k. Your task is to count the number of subarrays where the maximum element of the entire array appears at least k times. Sliding Window to the Rescue This is a classic case where brute force (O(n²)) would time out. The key to optimizing…
I’m a 27-year-old guy, and honestly, I never thought I was missing a motorcycle—until February 2024, when I bought my first one: the Royal Enfield Meteor 350. Since then, I’ve been to quite a few places on it, but this was my first solo trip. So, what motivated me? Not to sound cliché, but I…
When working with SSL, SAML, JWT, or other cryptographic systems, it’s essential to ensure that your private key and certificate actually belong to each other. A mismatch can lead to hours of frustrating errors like: Failed to decrypt Invalid signature No matching private key found I have encountered few of those errors and didn’t explored…
When working with UUIDs in Scala using json4s, you might run into issues serializing and deserializing UUID objects by default. Json4s does not handle java.util.UUID out-of-the-box. Fortunately, there’s a simple and elegant solution using JavaTypesSerializers. To enable UUID support in json4s, you can add JavaTypesSerializers.all to your implicit formats: When working with Java types like…
When working on APIs, secure endpoints often need an easy way to authorize requests during development and testing. Swagger (via Springdoc OpenAPI) lets us integrate JWT-based authentication directly into the UI. Here’s a breakdown of the configuration that makes this happen: Let’s break this down: Components Section: This part defines a new security scheme called…
Issue Description When starting Kubernetes in Docker Desktop, you may encounter the following error while pulling images: This issue occurs due to authentication failures while trying to pull images from Docker Hub or the Kubernetes image registry. Solution: Re-authenticate with Docker Hub A quick and effective fix is to log out and log back into…
When working with Java applications, you may encounter the following error like I did: This issue arises because your code is attempting to use the internal sun.security.x509.X500Name class. Starting with Java 9, the Java Platform Module System (JPMS) restricts access to internal APIs such as sun.security.*, making them inaccessible unless explicitly allowed. Why This Happens…
There are multiple ways to enable CORS in Spring Boot. Enable CORS Globally To apply CORS settings to all endpoints in your Spring application, you can use the WebMvcConfigurer interface. Enable CORS for Specific Endpoints You can use the @CrossOrigin annotation to enable CORS for specific controllers or methods. This approach is ideal if you…
In the brief span of human existence, typically limited to a mere 70 or 80 years, our lives are intricately woven from the threads of our daily actions, each year, month, and day contributing to the tapestry. It is in this finite timeframe that we strive to achieve a balance between fulfilling relationships, financial stability,…
In Single Sign-On (SSO) using Security Assertion Markup Language (SAML), there are two primary flows: Identity Provider (IdP)-initiated and Service Provider (SP)-initiated. Here’s a detailed comparison between the two: 1. SP-Initiated SAML Flow Flow: User Requests Access: The user tries to access a resource or application (the SP). Redirect to IdP: The SP redirects the…