SEN LLC - DEV Community

SEN LLC

Apr 19

How Much Faster Is Rust/WASM Than JS for Image Filters? I Ran Both Side by Side and Measured

#webassembly #rust #javascript #performance

1

6 min read

SEN LLC

Apr 19

A Cross-OS Port Finder in Rust — One CLI, Three Completely Different Data Formats

#rust #cli #linux #networking

9 min read

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Apr 18

A 300-Line GitHub Actions Security Linter: Five Rules That Catch the CVE Patterns

#typescript #githubactions #security #cli

7 min read

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Apr 16

A TLS Certificate CLI in Rust — No OpenSSL, No Ceremony, Just a Fail-the-Build Exit Code

#rust #cli #tls #monitoring

1

7 min read

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Apr 16

CSV Sort, Done Right: Why `sort -t,` Is a Trap and What a 300-Line PHP CLI Does Instead

#php #cli #csv #tutorial

1

9 min read

SEN LLC

Apr 16

Reimplementing fd in 500 lines of Rust (and what I learned about the crates it stands on)

#rust #cli #filesystem #tutorial

10 min read

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Apr 16

I Built a .env Diff Tool That Refuses to Print Values

#typescript #env #cli #tutorial

10 min read

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Apr 16

Writing a Regex Playground in 200 Lines of Rust

#rust #regex #cli #tutorial

9 min read

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Apr 16

A 10 MB Markdown-to-HTML Service in Rust with pulldown-cmark

#rust #axum #markdown #tutorial

9 min read

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Apr 16

git log --pretty is a tiny DSL: building a zero-dep CHANGELOG generator

#typescript #git #cli #tutorial

8 min read

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Apr 16

Seed Data Without a Dependency Tree: A Tiny PHP CLI Instead of Faker

#php #cli #database #tutorial

10 min read

SEN LLC

Apr 16

sharp on Alpine Without Tears: a 260 MB Image Resize API in Hono

#typescript #hono #sharp #tutorial

9 min read

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Apr 16

Writing a tar Inspector in Rust with Three Dependencies

#rust #tar #cli #tutorial

9 min read

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Apr 16

A Tiny PHP Invoice-PDF API: Slim 4, dompdf, and the JPY Rounding Footgun

#php #slim #pdf #tutorial

9 min read

SEN LLC

Apr 16

Writing dig in 500 Lines of Rust (with hickory-resolver, the trust-dns successor)

#rust #dns #cli #tutorial

10 min read

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Apr 16

Writing Cron Semantics in ~100 Lines of TypeScript

#typescript #cron #cli #tutorial

1

8 min read

SEN LLC

Apr 16

PHPStan's JSON Output Is Noise. I Wrote a Formatter with a Baseline Diff.

#php #phpstan #cli #tutorial

9 min read

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Apr 16

I Got Tired of Pasting EXPLAIN Plans Into Web Tools, So I Wrote pg-explain-viz

#rust #postgres #cli #tutorial

10 min read

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Apr 16

Discord Slash Commands Without an SDK: ed25519 in 250 Lines of TypeScript

#typescript #hono #discord #tutorial

10 min read

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Apr 16

Writing an HTTP Load Tester That Doesn't Lie About p99

#rust #benchmark #http #tutorial

8 min read

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Apr 16

A Portfolio-Sized URL Shortener in 300 Lines of PHP

#php #slim #urlshortener #tutorial

1

9 min read

SEN LLC

Apr 16

Describing Cron Expressions: Why Templates Don't Work, and What Does

#typescript #cron #cli #tutorial

8 min read

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Apr 16

Writing a YAML Linter in Rust Because YAML Is Secretly Terrible

#rust #yaml #cli #tutorial

11 min read

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Apr 16

Parsing Prisma Schema By Hand: A 300-Line CLI That Emits Mermaid ER Diagrams

#typescript #prisma #mermaid #tutorial

10 min read

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Apr 16

Debugging TCP by Building Your Own Logging Proxy in 400 Lines of Rust

#rust #tokio #networking #tutorial

8 min read

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Apr 16

Building an XPath Query Tool in PHP — Slice XML Like a Pro

#php #cli #xml #xpath

8 min read

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Apr 16

Building a Changelog Generator in Rust — From Conventional Commits to Keep a Changelog

#rust #cli #git #changelog

8 min read

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Apr 16

Building a .gitignore Generator CLI in Python — 51 Templates, Zero Dependencies

#python #cli #git #devtools

9 min read

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Apr 16

Building a MIME Type Lookup CLI in TypeScript — 800+ Types, Magic Bytes, and Zero Dependencies

#typescript #cli #mime #fileformat

8 min read

SEN LLC

Apr 16

Building a TOML Formatter in Rust — Sorted Keys, Aligned Equals, and CI-Friendly Check Mode

#rust #cli #toml #formatter

8 min read

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Apr 16

Building an HTTP Status Code Reference CLI in PHP — No Dependencies Required

#php #cli #http #tutorial

8 min read

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Apr 16

I Wrote a .env Linter from Scratch — Here Are the 9 Rules That Actually Matter

#python #cli #dotenv #tutorial

8 min read

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Apr 16

Building a Configurable TCP Echo Server in Rust with Tokio

#rust #networking #tcp #cli

8 min read

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Apr 16

Implementing semver 2.0.0 from scratch in TypeScript — no semver package allowed

#typescript #cli #semver #devtools

9 min read

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Apr 16

Building a strict INI parser from scratch in Python — no configparser allowed

#python #cli #config #parser

8 min read

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Apr 16

Building a Concurrent TCP Port Scanner in Rust with Tokio Semaphores

#rust #networking #async #cli

9 min read

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Apr 16

phpcron: a tiny PHP CLI for poking at cron expressions

#php #cli #cron #scheduling

8 min read

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Apr 16

Writing a compliant RFC 6902 JSON Patch CLI in one evening, zero runtime deps

#typescript #cli #json #rfc6902

9 min read

SEN LLC

Apr 16

A 600-line Rust log rotator, or: what logrotate would look like if it had no config file

#rust #cli #logs #ops

10 min read

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Apr 15

Micro-benchmarking TypeScript Without Lying to Yourself

#typescript #benchmark #cli #tutorial

1

8 min read

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Apr 15

The Four Rate-Limiting Algorithms You Should Know (I Built a PHP Service That Runs All Five)

#php #slim #ratelimiting #tutorial

10 min read

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Apr 15

A Polite Port Scanner in 400 Lines of Tokio

#rust #cli #networking #tutorial

9 min read

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Apr 15

Counting TypeScript Escape Hatches — A Zero-Dependency CLI with a Baseline Gate

#typescript #cli #migration #tutorial

9 min read

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Apr 15

The similar crate is underrated: I wrote a colored diff CLI in a weekend

#rust #cli #diff #tutorial

8 min read

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Apr 15

A Minimum-Viable RSS Aggregator in TypeScript with Hono

#typescript #hono #rss #tutorial

12 min read

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Apr 15

SQLite's PRAGMAs You Never Remember — I Put Them in a CLI

#rust #sqlite #cli #tutorial

8 min read

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Apr 15

A Self-Hosted PHP Contact Form Backend Without CAPTCHA

#php #slim #webform #tutorial

7 min read

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Apr 15

I Built jq for TOML Because My Shell Scripts Deserved Better

#rust #cli #toml #tutorial

9 min read

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Apr 15

pdf-lib Is an Under-Appreciated Gem: A Tiny PDF API in TypeScript

#typescript #hono #pdf #tutorial

10 min read

SEN LLC

Apr 15

Building a URL Shortener in Rust with axum, SQLite, and 30 Lines of base62

#rust #axum #sqlite #tutorial

9 min read

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Apr 15

I Built a CLI Runner for VS Code's `.http` Files in ~500 Lines of TypeScript

#typescript #node #cli #tutorial

8 min read

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Apr 15

npm audit --json Is Unreadable. I Wrote a Formatter With Zero Dependencies.

#typescript #npm #security #tutorial

2

8 min read

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Apr 15

TOTP From First Principles: Building an RFC 4226 / 6238 CLI in Rust

#rust #cli #security #tutorial

1

9 min read

SEN LLC

Apr 15

Envelope Encryption for .env Files, the Right Way (PHP CLI, Stdlib Only)

#php #cli #security #tutorial

9 min read

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Apr 15

Mocking an OpenAPI Spec From Scratch in 600 Lines of TypeScript

#typescript #hono #openapi #tutorial

9 min read

SEN LLC

Apr 15

Parsing RSS and Atom From Scratch in Rust with quick-xml

#rust #axum #rss #tutorial

1

10 min read

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Apr 15

The Four Pagination Strategies Every Backend Dev Should Know

#php #slim #api #tutorial

9 min read

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Apr 15

zod-to-schema: A Zero-Config CLI That Runs Your TypeScript In-Process

#typescript #zod #jsonschema #tutorial

8 min read

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Apr 15

A local requestbin in 200 lines of PHP — why self-hosting beats webhook.site for production debugging

#php #slim #webhooks #tutorial

9 min read

SEN LLC

Apr 15

The `notify` crate is surprisingly pleasant — I built a cross-platform file watcher in four dependencies

#rust #cli #developertools #tutorial

8 min read

Writing Debut