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In this case I'd not bother with Refresh but for the full answer see: What is the point of Refresh if Dynamic has an UpdateInterval option? If you have nested Dynamic where you want to explicitly …

Exceptions in the standard stylesheet/style inheritance stack Quick list of deviations Feel free to add anything, try to make it short and if needed add examples or more explanation at the end of the …

Support for Directory[] This was always puzzling me but I'm happy to delete this answer if I'm alone in this. TL;DR; Functions that do NOT respect Directory[]: NotebookOpen (*1*) NotebookLocat …

Arguments conventions for export like functions It is not that tough yet I'm always confused, so again, if that is only me let me know and I will delete that answer. Export[ "where", what, how] …

Exceptions to "first option's value takes precedence" rule One usually expects expr[opt1 -> a, opt1 -> b] to be equivalent to expr[opt1 -> a]. At the end this is how Replace* functions work: opt1 /. …

I have not heavily tested it but I decided to give it a try because I don't like minor issues with other proposals. E.g. that old options stay in Options or the way legacy rules are applied/used. Her …

The problem I see is that in principle every package should be suited to be embedded with specific context. And we can't expect everyone to start writing packages in this manner. So it should be Other …

It is possible, your code works. I don't see any downsides which aren't a matter of taste. I like to keep usages next to definitions too. But I hate using full names, you can just mention symbols in …

...Q functions that can return something else than True or False TL;DR; Those exceptions return unevaluated or $Failed which needs handling. Or if you don't want to think about that and only True is w …

How about: BeginPackage["MyPackage`"]; ClearAll["`*", "`*`*"]; foo; DisableMemoization; Begin["`Private`"]; foo[0] = 0; foo[x_Integer?Positive] := foo[x] = foo[x - 1] + x; DisableMem …

Short answer is, you can achieve the same with different idioms but some are better in some cases than another. Pick the one that reduces amount of code that you and user need to write because it will …

This is a supplementary answer to what John Fultz has provided. Problem 1: The problem is that sometimes I can't include all functionality inside the palette nor I can call Needs to load it after ke …

J. Fultz' answer indicates that it is not a bug but a feature which needs better documentation. Get a habit of defining your procedures with [], e.g. f[]:=Print[1]. (Which creates DownValues instead …

JHM is right about the reason. John Fultz shows nice versioning and coding style I'm encouraging to use. Yet there is no answer to how to avoid this problem in general and flexible way. Here is my att …

I don't have much experience with writting books or articles in Mathematica so let me just add technicall notes. For use cases I'd search around using those styles as keywords: How do I use the style …