nushell/crates/nu-command
Nano 7b89fab327
Keep order for par-each (#10249)
# Description
This PR adds new flag `--keep-order/-k` for the `par_each` filter. This
flag keeps sequence of output same as the order of input.

Output without the flag:
```nu
> 1..6 | par-each {|n| $n * 2 }
╭────╮
│  4 │
│ 10 │
│  2 │
│  8 │
│ 12 │
│  6 │
╰────╯
```

Output with the `--keep-order` flag:
```nu
> 1..6 | par-each --keep-order {|n| $n * 2 }
╭────╮
│  2 │
│  4 │
│  6 │
│  8 │
│ 10 │
│ 12 │
╰────╯
```

I think the presence of this flag is justified, since:
- Much easier to use than `.. | enumerate | par-each {|p| update item
..} | sort-by index | get item`
- Faster, as it uses internally parallel sorting in the same thread pool

A note about naming: it may conflict with `--keep-empty/-k` flag of the
`each` filter if the same feature will be used in `par-each`, so maybe
it needs some other name.
2023-09-11 06:42:09 -05:00
..
src Keep order for par-each (#10249) 2023-09-11 06:42:09 -05:00
tests Fix variables not allowed in ucp (#10304) 2023-09-10 17:54:33 -05:00
Cargo.toml Bump calamine and fix clippy (#10314) 2023-09-11 12:39:52 +02:00
LICENSE Fix rest of license year ranges (#8727) 2023-04-04 09:03:29 +12:00