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Hazel, a live functional programming environment featuring typed holes.
Hazel is an interactive functional programming environment that lets you write and explore code with live feedback and support for typed holes.
Experiment with live functional code instantly
Hazel is a unique online programming environment built for functional programming. It lets you write code in real time and see immediate feedback, even when your programs aren’t fully complete. The standout feature is its support for 'typed holes,' so you can explore and experiment with unfinished code without breaking your workflow.
This environment is great if you’re learning functional programming or want to prototype ideas quickly. You can try out code directly in your browser, make edits on the fly, and understand how your changes affect the program. Whether you’re a student, teacher, or developer curious about live coding, Hazel offers a hands-on space to play, learn, and iterate.
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