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Diffstat (limited to 'commentary/problems.md')
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diff --git a/commentary/problems.md b/commentary/problems.md index 017d680b..c211954a 100644 --- a/commentary/problems.md +++ b/commentary/problems.md @@ -184,6 +184,9 @@ Select chooses whether the left argument maps to right argument axes or selects ### Unclear primitive names Blanket issue for names that I don't find informative: "Solo", "Bins", "Find", and "Group". +### Tacit exports can leak data +One of the nice facets of BQN's module system is that it provides perfect encapsulation: if you have variables `a` and `b` in a namespace (or closure) initialized so that `a≤b`, and all exported operations maintain the property that `a≤b`, then that property will always be true. Well, not quite: if you define, say `Inc ⇐ IncA ⊣ IncB` to increase the values of both `a` and `b` by `𝕩`, then `Inc` maintains `a≤b`, but `IncA` doesn't—and it can be extracted with `•Decompose`. This isn't too serious because it sounds impossible to do accidentally, and it's easy to protect against. + ### Strands go left to right This is the best ordering, since it's consistent with `⟨⋄⟩` lists. And code in a strand probably shouldn't have side effects anyway. Still, it's an odd little tack-on to say separators *and strands* go left to right, and it complicates the implementation a little. |