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A collaborative guide to implementing algorithms

English meanings connected to examples and related words

Definitions connected to sentence examples and grammar articles

Programming study alongside practice and contests

A contest community with a reusable programming problemset

A programming-problem collection with community discussion

Project-oriented coding courses across technical subjects

Programming explanations alongside algorithm practice

A topic-organized collection of programming tutorials

Edit code on iPhone or iPad with broad syntax highlighting, remote file access, and an SSH terminal.

A reactive Python notebook editor that saves notebooks as ordinary Python files.

Write statically typed Nim programs and compile them with a toolchain designed for systems and application work.

Compile systems software with a general-purpose language built around explicit control and cross-compilation.

Compile Ruby-inspired, statically typed Crystal programs into native executables.

A language, runtime, and library platform for concurrent, fault-tolerant applications.

Preview and deploy infrastructure changes through the same CI workflow as application code.

Create compiled programs and reusable modules with Go's language and standard toolchain.

Add static type checking and compiler configuration to a JavaScript project.

Build JVM and multiplatform applications with an open-source language and compiler toolchain.

Brazilian crypto trading with quick, classic and advanced interfaces

A Python property-based testing library that generates inputs to challenge the properties your code should preserve.

Use one API key to access data APIs across finance, technology, places, text, and more.

Build interactive terminal interfaces in Rust with reusable widgets and responsive layouts.

Experiment with financial language models, sentiment and forecasts