Edit: mentioned this in the README explicitly. Thanks!

Edit: I have updated the documentation to mention this explicitly, thanks!

Comments URL: https://news.ycombinator.com/item?id=44840307

Points: 51

# Comments: 20

(I guess we're duplicating threads at this point :D)

I have tried Bash namerefs. I found them to be kinda awkward, since you need to name them uniquely. So, you have to pretend that they are global variables, even though they are declared inside a function, which makes their usage verbose.

Here, this could look like:

  split_by_double_dash() {
    declare -n split_by_double_dash_before=$1
    declare -n split_by_double_dash_after=$2
    
    split_by_double_dash_before=()
    split_by_double_dash_after=()

    ...
  }

Comments URL: https://news.ycombinator.com/item?id=44825175

Points: 41

# Comments: 14

Remote: yes.

Willing to relocate: yes.

Technologies: Rust, C/C++, Bash, Go, Linux, Nix.

Résumé/CV: https://alurm.github.io/resume/alan-urmancheev.html (or .pdf for a PDF).

Email: alan.urman@gmail.com.

A systems programmer. Prefer US opportunities.

(Implicitly) using [1] instead of [false] as a default is less typing for sure (but maybe a bit more confusing?).

Also, objects being switched on really have to be tables in my version anyway (since overriding __call for builtin types seems harsh to me), so having a tag field right in them as opposed to creating a metatable should be more efficient.

For my version I'll add a value-weak map of metatables to dedup them, should work as well.

In terms of functions, yeah, I don't think you can get rid of them, but (in the example) you can avoid (r) and (s) params if you assume that the functions lexically close over shape.

I found it nice how it's possible to emulate switches in Lua with so little code, without the result looking too ugly. You may find this pattern useful. That's it.

The catch is that, unlike with normal switches or with a series of "if"s, there's a whole bunch of indirection added via functions, so it's not very efficient.

Perhaps LuaJIT can inline these functions, but I haven't tested it.

Comments URL: https://news.ycombinator.com/item?id=42547208

Points: 83

# Comments: 7

But I prefer openbsd or man7 pages, sure.