Thursday, May 10

Haskell online typechecker (2)

haskellonline.org, my recent experiment to make learning Haskell easier, has been doing quite well. More than a thousand people have checked the site out since my last blog post. Yay!

I have since prettied up the interface a little bit. The editor now highlights not just the line, but also the error token itself. Simple code folding is now available too: try clicking in the gutter (near the line numbers) on the first line of a multiline definition.

Kudos to Marijn Haverbeke, author of CodeMirror, the Javascript code editing component, which made it possible to write and deploy haskellonline.org in a weekend rather than a month.

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