Wren
Wren
About WrenPractice

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Join Exercism’s Wren Track for access to 96 exercises with automatic analysis of your code and personal mentoring, all 100% free.

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About Wren

class Wren {
  flyTo(city) {
    System.print("Flying to %(city)")
  }
}

96 coding exercises for Wren on Exercism. From Resistor Color Duo to Sublist.

Get better at programming through fun, rewarding coding exercises that test your understanding of concepts with Exercism.

Resistor Color Duo

Resistor Color Duo

Convert color codes, as used on resistors, to a numeric value.

Flatten Array

Flatten Array

Take a nested list and return a single list with all values except nil/null.

Sublist

Sublist

Write a function to determine if a list is a sublist of another list.

See all Wren exercises on Exercism

Key Features of Wren

Wren

Familiar

Wren uses a familiar, modern syntax familiar to many coming from JS or another C-like language.

Small

Wren's VM implementation is under 4,000 semicolons of readable and lovingly commented C code.

Fast

A single-pass compiler, tight byte-code, and compact objects keeps Wren fast on it's feet.

Concurrent

Lightweight fibers let you organize your program into a flock of communicating coroutines.

Embeddable

Easily embedded, no dependencies, a small standard lib, and easy-to-use C API.

Class-based

Many scripting languages lack (or have unusual) object models. Wren places classes front and center.

Get mentored the Wren way

Every language has its own way of doing things. Wren is no different. Our mentors will help you learn to think like a Wren developer and how to write idiomatic code in Wren. Once you've solved an exercise, submit it to our volunteer team, and they'll give you hints, ideas, and feedback on how to make it feel more like what you'd normally see in Wren - they'll help you discover the things you don't know that you don't know.

Learn more about mentoring

Community-sourced Wren exercises

The Wren track on Exercism has 96 exercises to help you write better code. Discover new exercises as you progress and get engrossed in learning new concepts and improving the way you currently write.

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Wren

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