Macaulay2 / Macaulay2/M2

try modifier in apply,select,etc

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#4,184 2 comments 0 reactions 0 assignees View on GitHub

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Dominant language
Macaulay2
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435
Forks
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4d 20h
Merged PRs (30d)
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Description

Not long ago we added support for something like:
```m2
i6 : select(-5..5, even and not zero)

o6 = (-4, -2, 2, 4)
```
Which is pretty nice. Basically `not Function` and `Function and Function` return a function that negate the output or and the outputs.

Would be neat if this was also supported:
```m2
apply(10, try myfunc)
```

Maybe this is not feasible because there's an actual double meaning here, in which case case I'm happy to close this.

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Research direction

Start by reviewing the existing behavior for `not Function` and `Function and Function`, then examine how the `apply` and `select` entry points handle function arguments. Define whether `try myfunc` has an unambiguous meaning, implement support only if the semantics are clear, and verify the supplied `apply(10, try myfunc)` example.

Written by the indexing model from the issue text.

Assessment

Domain
devtools
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Quiet
Clarity
Mostly clear
Newbie friendliness
38/100

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