John Carmack on mutable variables

In python its common to see code like this:

  df = pd.concat(df,other_df)
  df = df.select(...)
  ...

My eyes hurts, when I see it. It makes me avoid python. I bet the reason for this mutable code is a missing simple pipes syntax. I love pipes. In R can do:

  df |> 
    rbind(other_df) |> 
    select(...)

It feels much better.

Elixir too (Explorer library; default backend is Pola.rs based)

- https://github.com/elixir-explorer/explorer - https://hexdocs.pm/explorer/Explorer.html

pandas has a .pipe operator which works exactly like this

Wouldn't that be simply:

  df = pd.concat(df,other_df).select(...)

My eyes would hurt more if I had to look all day at the vertical misalignment of that |> operator

You could always switch to a better font like Fira Code which has a ligature for this.

The gp's comment wasn't made regarding the look of the operator in its ascii representation `|>` but about the vertical misalignment.

Typically you align a pipeline like so:

     df
     |> rbind(other_df)
     |> select(...)

But these topics are largely left to code formatters these days.

Nah, it doesn't. Although you can do similar in Elixir.

Weird, I have always aligned as the gp showed. I’m reasonably sure tidyverse documentation does the same (which is probably where we both picked it up from).