# Description
I noticed that `std/iter scan`'s closure has the order of parameters
reversed compared to `reduce`, so changed it to be consistent.
Also it didn't have `$acc` as `$in` like `reduce`, so fixed that as
well.
# User-Facing Changes
> [!WARNING]
> This is a breaking change for all operations where order of `$it` and
`$acc` matter.
- This is still fine.
```nushell
[1 2 3] | iter scan 0 {|x, y| $x + $y}
```
- This is broken
```nushell
[a b c d] | iter scan "" {|x, y| [$x, $y] | str join} -n
```
and should be changed to either one of these
- ```nushell
[a b c d] | iter scan "" {|it, acc| [$acc, $it] | str join} -n
```
- ```nushell
[a b c d] | iter scan "" {|it| append $it | str join} -n
```
# Tests + Formatting
Only change is in the std and its tests
- 🟢 toolkit test stdlib
# After Submitting
Mention in release notes
# Description
Uses "normal" module `std/<submodule>/mod.nu` instead of renaming the
files (as requested in #13842).
# User-Facing Changes
No user-facing changes other than in `view files` results. Imports
remain the same after this PR.
# Tests + Formatting
- 🟢 `toolkit fmt`
- 🟢 `toolkit clippy`
- 🟢 `toolkit test`
- 🟢 `toolkit test stdlib`
Also manually confirmed that it does not interfere with nupm, since we
did have a conflict at one point (and it's not possible to test here).
# Performance Tests
## Linux
### Nushell Startup - No config
```nu
bench --pretty -n 200 { <path_to>/nu -c "exit" }
```
| Release | Startup Time |
| --- | --- |
| 0.98.0 | 22ms 730µs 768ns +/- 1ms 515µs 942ns
| This commit | 9ms 312µs 68ns +/- 709µs 378ns
| Yesterday's nightly | 9ms 230µs 953ns +/- 9ms 67µs 689ns
### Nushell Startup - Load full standard library
Measures relative impact of a full `use std *`, which isn't recommended,
but worth tracking.
```nu
bench --pretty -n 200 { <path_to>/nu -c "use std *; exit" }
```
| Release | Startup Time |
| --- | --- |
| 0.98.0 | 23ms 10µs 636ns +/- 1ms 277µs 854ns
| This commit | 26ms 922µs 769ns +/- 562µs 538ns
| Yesterday's nightly | 28ms 133µs 95ns +/- 761µs 943ns
| `deprecated_dirs` removal PR * | 23ms 610µs 333ns +/- 369µs 436ns
\* Current increase is partially due to double-loading `dirs` with
removal warning in older version.
# After Submitting
Still TODO - Update standard library doc
