New answers tagged programming
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How to use Intersection[] but keep the original list order?
Since V 13.1 there is DeleteElements
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How to use Intersection[] but keep the original list order?
Using DeleteCases, Complement and Alternatives:
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How to ensure that Polygon[list] plots a simple polygon?
Based on 195229, the points can be sorted to create a convex polygon. As a demonstration and comparison with ConvexHullMesh:
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How to insert / merge a list into another list?
Since V 13.1 there is Splice which simplifies @Simon Wood's insertSequence3 to
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How to post message about invalid options and return unevaluated input?
CheckArguments was mentioned in a comment, here is how you can modify your code to use it:
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How to post message about invalid options and return unevaluated input?
This does almost exactly what I asked for
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