nushell/crates/nu-protocol/src
Thomas Coratger 0bd4d27e8d
Modify reject algorithm for identical elements (#8446)
# Description

The correction made here concerns the issue #8431. Indeed, the algorithm
initially proposed to remove elements of a `vector` performed a loop
with `remove` and an incident therefore appeared when several values
were equal because the deletion was done outside the length of the
vector:
```rust
let mut found = false;
for (i, col) in cols.clone().iter().enumerate() {
    if col == col_name {
        cols.remove(i);
        vals.remove(i);
        found = true;
    }
}

```

Then, `[[a, a]; [1, 2]] | reject a: ` gave `thread 'main' panicked at
'removal index (is 1) should be < len (is 1)',
crates/nu-protocol/src/value/mod.rs:1213:54`.

The proposed correction is therefore the implementation of the
`retain_mut` utility dedicated to this functionality.

```rust
let mut found = false;
let mut index = 0;
cols.retain_mut(|col| {
    if col == col_name {
        found = true;
        vals.remove(index);
        false
    } else {
        index += 1;
        true
    }
});
```
2023-03-14 23:26:48 +01:00
..
ast explain command (#7957) 2023-02-09 13:59:38 -06:00
engine FEATURE: add the startup time to $nu (#8353) 2023-03-09 14:18:58 -06:00
value Modify reject algorithm for identical elements (#8446) 2023-03-14 23:26:48 +01:00
alias.rs Document and critically review ShellError variants - Ep. 3 (#8340) 2023-03-06 18:33:09 +01:00
cli_error.rs Clippy fix for Rust 1.63 (#6299) 2022-08-11 11:54:54 -05:00
config.rs Hide 7925 (#8359) 2023-03-09 10:26:59 +13:00
example.rs Make plugin commands support examples. (#7984) 2023-02-08 16:14:18 -06:00
exportable.rs Removes export env command (#6468) 2022-09-25 19:52:43 +03:00
id.rs Overlays (#5375) 2022-05-08 07:39:22 +12:00
lev_distance.rs Reduce again the number of match calls (#7815) 2023-01-24 12:23:42 +01:00
lib.rs Re-implement aliases (#8123) 2023-02-27 20:44:05 +13:00
module.rs Allow main command to define top-level module command (#7764) 2023-01-22 21:34:15 +02:00
pipeline_data.rs Box ShellError in Value::Error (#8375) 2023-03-12 09:57:27 +01:00
plugin_signature.rs Make plugin commands support examples. (#7984) 2023-02-08 16:14:18 -06:00
shell_error.rs Document and critically review ShellError variants - Ep. 3 (#8340) 2023-03-06 18:33:09 +01:00
signature.rs view span & view files commands (#7989) 2023-02-09 11:35:23 -06:00
span.rs Use variable names directly in the format strings (#7906) 2023-01-29 19:37:54 -06:00
syntax_shape.rs Use variable names directly in the format strings (#7906) 2023-01-29 19:37:54 -06:00
ty.rs Display empty records and lists (#7925) 2023-02-22 16:18:33 +00:00
util.rs move BufferedReader out of nu-command (#7697) 2023-01-06 15:22:17 -08:00
variable.rs Limited mutable variables (#7089) 2022-11-11 19:51:08 +13:00