Add example from the DLang Tour to the example roulette

[wilzbach]

Full credit for this example goes to @JackStouffer dlang-tour/english#137 - I merely reformatted it and added @nogc to prove the point ;-)

While adding the example, I realized that the existing roulette mechanism was broken.

CC @CyberShadow @ZombineDev

[CyberShadow]

Needs a short comment at the top describing what the program is doing.

[andralex]

Comment should be before main - perhaps even a ddoc comment.

[CyberShadow]

Would be nice to avoid the example switching after the page loads.

Could be done by forcing the JavaScript to print a random example as the page loads (using document.write), and having a fallback in a <noscript> tag.

[wilzbach]

Needs a short comment at the top describing what the program is doing.

Ok. Added.

Would be nice to avoid the example switching after the page loads.
Could be done by forcing the JavaScript to print a random example as the page loads (using document.write), and having a fallback in a tag.

Yeah I don't like the current solution either. Will make a PR with something smarter ;-)

[CyberShadow]

This example would be a good deal more exciting if all of main was @nogc... as it is, the lambda literal is going to be incomprehensible to most people not familiar with the language.

Perhaps it's better to just drop the lambda literal and only leave the comment.

@andralex What do you think? I think you would like to review all new non-trivial front page changes anyway.

[PetarKirov]

I think it would be nice to have a drop down, like on the golang page. I remember back some time ago when I wanted to show one particular example to a friend that I had to reload the page a couple of times to get to it.

[andralex]

The example is fine. Would be great to have a little button somewhere "Another" that loads another random example. Also examples should have nice titles such as "Sort", "Find min and max", etc.

[andralex]

Comment should be before main - perhaps even a ddoc comment.

[andralex]

nogc would indeed be best in main

[wilzbach]

Yep, of course, but this depends on writefln (or similar) to be @nogc ...
And the assumeNoGC hack seemed to ugly for a frontpage example.

[CyberShadow]

Would be great to have a little button somewhere "Another" that loads another random example.

#1777

[dlang-bot]

Thanks for your pull request, @wilzbach!

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[wilzbach]

Would be great to have a little button somewhere "Another" that loads another random example.

As #1777 has been merged & deployed, I rebased this PR.

Also examples should have nice titles such as "Sort", "Find min and max", etc.

#1777 implies this ;-)

[wilzbach]

Ping @CyberShadow - I think we are all set here :)

[wilzbach]

Ping @CyberShadow - I think we are all set here :)

Rebased -> should be good to go (it has even been approved by Andrei).

[CyberShadow]

Looks like you need to rebase.

[wilzbach]

Looks like you need to rebase.

That was weird - rebase worked without interaction on my machine ...