Devanshu Biswas - DEV Community

Devanshu Biswas

Jun 28

OrderHub Day 9: Integration Tests on Real Postgres With Testcontainers

#java #spring #testing #beginners

1

1 min read

Devanshu Biswas

Jun 28

Mixture of Experts: Big Models, Cheap Inference

#ai #llm #machinelearning #beginners

2 min read

Devanshu Biswas

Jun 28

Batch Normalization: Why It Made Deep Nets Trainable

#machinelearning #deeplearning #ai #beginners

1 min read

Devanshu Biswas

Jun 28

The Bias-Variance Tradeoff, Finally Visualized

#machinelearning #ai #datascience #beginners

1 min read

Devanshu Biswas

Jun 28

Generate SHA Hashes in the Browser With the Web Crypto API

#javascript #webdev #security #beginners

1 min read

Devanshu Biswas

Jun 28

Self-Ask Prompting: Let the Model Interview Itself

#ai #llm #promptengineering #beginners

1 min read

Devanshu Biswas

Jun 28

A Date Picker From Scratch — the Whole Calendar Is Two Lines

#javascript #css #webdev #beginners

1

1 min read

Devanshu Biswas

Jun 28

I Built the 15-Puzzle — and Why Half of All Shuffles Are Impossible

#javascript #gamedev #webdev #beginners

1 min read

Devanshu Biswas

Jun 28

Context vs Prop Drilling: I Put the Re-render Blast Radius Side by Side

#react #javascript #webdev #beginners

2 min read

Devanshu Biswas

Jun 28

I Built a Searchable HTTP Status Reference With the Exact Spring Way to Return Each

#spring #java #webdev #backend

2 min read

Devanshu Biswas

Jun 27

OrderHub Day 8: Testing With JUnit 5, Mockito & MockMvc (Spring Boot)

#java #spring #testing #beginners

1

1 min read

Devanshu Biswas

Jun 27

Prompt Injection: How It Works and How to Defend

#ai #llm #security #beginners

1

1 min read

Devanshu Biswas

Jun 27

Q-Learning From Scratch: Reinforcement Learning in a Gridworld

#machinelearning #ai #reinforcementlearning #beginners

1 min read

Devanshu Biswas

Jun 27

Cross-Validation: Why One Train/Test Split Lies

#machinelearning #ai #datascience #beginners

1 min read

Devanshu Biswas

Jun 27

The WCAG Contrast Ratio, Explained (With a Live Checker)

#javascript #css #a11y #beginners

1

1 min read

Devanshu Biswas

Jun 27

Least-to-Most Prompting: Decompose, Then Solve in Order

#ai #llm #promptengineering #beginners

1 min read

Devanshu Biswas

Jun 27

I Built a Carousel With Zero Libraries (Swipe + Autoplay)

#javascript #css #webdev #beginners

1

1 min read

Devanshu Biswas

Jun 27

I Built Wordle in Vanilla JS — the Duplicate-Letter Trap

#javascript #gamedev #webdev #beginners

1

1 min read

Devanshu Biswas

Jun 27

useMemo vs useCallback: I Built a Tool That Makes Referential Equality Visible

#react #javascript #webdev #beginners

3

2 min read

Devanshu Biswas

Jun 27

I Built a Visualizer for the Spring Bean Lifecycle (Context Startup, @PostConstruct, Prototype Beans)

#spring #java #backend #webdev

2 min read

Devanshu Biswas

Jun 26

I Built a Live Timeline of React Hooks (useState, useEffect, useMemo, useRef)

#react #javascript #webdev #beginners

2

2 min read

Devanshu Biswas

Jun 26

I Built an Interactive Kafka Playground (Partitions, Keys, Consumer Groups, Offsets)

#kafka #java #backend #webdev

1

2 min read

Devanshu Biswas

Jun 26

OrderHub Day 7: Config & Profiles With @ConfigurationProperties (Spring Boot)

#java #spring #webdev #beginners

1

1 min read

Devanshu Biswas

Jun 26

How LLMs Are Trained: Pretraining, SFT, and RLHF

#ai #llm #machinelearning #beginners

1 min read

Devanshu Biswas

Jun 26

Transfer Learning: Stand on a Pretrained Model

#machinelearning #deeplearning #ai #beginners

1 min read

Devanshu Biswas

Jun 26

Regularization From Scratch: L1 vs L2, Visualized

#machinelearning #ai #datascience #beginners

1 min read

Devanshu Biswas

Jun 26

Why split(',') Breaks CSV — and a Parser That Doesn't

#javascript #webdev #json #beginners

1 min read

Devanshu Biswas

Jun 26

Step-Back Prompting: Ask the Bigger Question First

#ai #llm #promptengineering #beginners

1 min read

Devanshu Biswas

Jun 26

I Rebuilt Instagram Stories' Segmented Progress Bars

#javascript #css #webdev #beginners

1

1 min read

Devanshu Biswas

Jun 26

I Built Memory Match in Vanilla JS (With a CSS 3D Flip)

#javascript #gamedev #webdev #beginners

1 min read

Devanshu Biswas

Jun 25

I Built a Tool That Shows You Exactly Why a React Component Re-renders

#react #javascript #webdev #beginners

1

2 min read

Devanshu Biswas

Jun 25

I Built a Tool That Shows the SQL Behind Any Spring Data Method Name

#spring #java #sql #webdev

2 min read

Devanshu Biswas

Jun 25

I Built a JWT Playground That Re-signs Tokens With Real HMAC-SHA256

#jwt #security #java #webdev

2 min read

Devanshu Biswas

Jun 25

I Built an Interactive Visualizer of the Spring Boot Request Lifecycle

#java #springboot #webdev #beginners

2 min read

Devanshu Biswas

Jun 25

OrderHub Day 6: Pagination, Sorting & Filtering in Spring Boot

#java #spring #webdev #beginners

1 min read

Devanshu Biswas

Jun 25

Multimodal AI: One Model That Sees, Reads, and Hears

#ai #llm #machinelearning #beginners

1 min read

Devanshu Biswas

Jun 25

Autoencoders Explained: Compress, Then Reconstruct

#machinelearning #deeplearning #ai #beginners

1 min read

Devanshu Biswas

Jun 25

DBSCAN From Scratch: Clustering by Density (with Noise)

#machinelearning #ai #datascience #beginners

1 min read

Devanshu Biswas

Jun 25

I Built a Password Strength Meter That Does the Real Math

#javascript #security #webdev #beginners

1

1 min read

Devanshu Biswas

Jun 25

Structured Output: Make an LLM Return Real JSON (Not Prose)

#ai #llm #json #beginners

1 min read

Devanshu Biswas

Jun 25

Skeleton Loaders: Shimmer Placeholders With Pure CSS

#css #webdev #ux #beginners

1 min read

Devanshu Biswas

Jun 25

I Built Whac-a-Mole in Vanilla JS (Timers + Random Spawns)

#javascript #gamedev #webdev #beginners

1 min read

Devanshu Biswas

Jun 24

OrderHub Day 5: Clean Error Handling With RFC-7807 ProblemDetail (Spring Boot)

#java #spring #webdev #beginners

1 min read

Devanshu Biswas

Jun 24

RAG Explained: Give an LLM Your Own Knowledge

#ai #rag #llm #beginners

1 min read

Devanshu Biswas

Jun 24

Diffusion Models Explained: Turning Noise Into Images

#machinelearning #deeplearning #ai #beginners

1 min read

Devanshu Biswas

Jun 24

Gradient Boosting From Scratch: Weak Trees Fixing Each Other

#machinelearning #ai #datascience #beginners

1 min read

Devanshu Biswas

Jun 24

I Built a JSON Formatter & Validator in the Browser (No Library)

#javascript #webdev #json #beginners

1 min read

Devanshu Biswas

Jun 24

Chain-of-Verification: Make an LLM Fact-Check Itself

#ai #llm #rag #beginners

1 min read

Devanshu Biswas

Jun 24

I Built a Drag-and-Drop Kanban Board With Zero Libraries

#javascript #css #webdev #beginners

1 min read

Devanshu Biswas

Jun 24

I Built Doodle Jump in Vanilla JS (the Endless Bouncer)

#javascript #gamedev #webdev #beginners

1 min read

Devanshu Biswas

Jun 23

OrderHub Day 4: Bean Validation + Clean DTOs (Spring Boot)

#java #spring #webdev #beginners

1 min read

Devanshu Biswas

Jun 23

Vector Databases: Search by Meaning, at Scale

#ai #llm #database #beginners

1

1 min read

Devanshu Biswas

Jun 23

GANs Explained: Two Networks That Make Fakes Real

#machinelearning #deeplearning #ai #beginners

1 min read

Devanshu Biswas

Jun 23

PCA From Scratch: Compress Data, Keep the Signal

#machinelearning #ai #datascience #beginners

1 min read

Devanshu Biswas

Jun 23

I Built a Live Regex Tester on the Browser's RegExp Engine

#javascript #regex #webdev #beginners

1 min read

Devanshu Biswas

Jun 23

Reranking: Retrieve Fast, Then Reorder Precisely (Better RAG)

#ai #rag #llm #beginners

1

1 min read

Devanshu Biswas

Jun 23

The Circular Progress Ring Is Just One SVG Circle + Two CSS Props

#css #svg #webdev #beginners

1

1 min read

Devanshu Biswas

Jun 23

I Built Simon (the Memory Game) in Vanilla JS + Web Audio

#javascript #gamedev #webdev #beginners

1 min read

Devanshu Biswas

Jun 22

OrderHub Day 3: Versioned Schema With Flyway Migrations (Spring Boot)

#java #spring #database #beginners

1

1 min read

Devanshu Biswas

Jun 22

Embeddings: Turning Meaning Into Numbers

#ai #llm #machinelearning #beginners

1 min read

Writing Debut