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# 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.
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| .. | ||
| src | ||
| tests | ||
| Cargo.toml | ||
| LICENSE | ||