Running set example errors

[heapwolf]

Freshly pulled from github, after running make...

./wren example/set.wren
WhereSequence does not implement '+(_)'.
[main line 91] in &(_)
[main line 110] in (script)
true

[bjorn]

Hrm, I didn't notice this example when I changed Sequence.where to be lazy rather that eagerly returning the computed list, which apparently the example Set class relies on.

The example can be fixed by adding .toList() at the end of each call to where and the call to map.

[bjorn]

Note that this example is now quite bad since implementing a set should be much more efficient based on the Map class instead of the List class. So while it could be fixed up to run, it probably really needs a complete rewrite.

Maybe it's something @zeckalpha would like to pick up again.

[munificent]

+1 for rewriting it to use a map.

[kmarekspartz]

Yeah, I wrote that before Maps existed. Feel free to remove the file entirely, too.

[munificent]

Done!