bieganek

I think the previous poster's use of the phrase "reach into your package" was a bit colorful. You're never actually modifying the internal code of a library. You're only extending a generic function from a library to work on your own custom type. So that extension only affects code that uses your new custom type. It's akin to using class inheritance in OOP languages.

> Long registry lookup times (2-5mins) when starting a new session

I'm not sure what you are referring to here. Yes, sometimes after you've installed new packages, the Julia VS Code Language Server has to do some re-indexing which can take some time, but they've improved this and you can still program and use the integrated REPL while this is occurring.

> Ctrl-click navigation does not work to lookup definitations in libraries

In VS Code, F12 (Go to Definition) does work. You can also use `@edit foo(x)` in the REPL.

> Filters and maps are not lazy

Use Iterators.filter or use generator expressions.

> Package management is done as a part of script execution

I'm also not sure what this refers to, but the package manager in Julia is one of the best things about Julia.

> Editors (Juno) do not check types at runtime when the information is readily available

The VS Code Julia extension has a linter that is pretty helpful. It's not perfect, but they're actively working on developing it.

> DataFrames.jl: Transform does nonsense (use map instead)

The new select and transform functions in DataFrames.jl are actually quite powerful and useful.

> DataFrames.jl: No transpose

Transpose is not a generic concept for a table. Sure, it might make sense in specific cases, but in general it doesn't make sense to transpose a table.

Julia code almost never has semicolons. Semicolons can be used at the REPL to suppress printing, but actual Julia code does not normally use semicolons.

I personally like the "end"s because I like the symmetry and they're prettier than curly braces. Also, there are some syntax color themes that color the "end"s in a darker color in order to de-emphasize the "end"s, which can be nice depending on your taste.