mirror of
https://github.com/nushell/nushell.git
synced 2024-11-22 00:13:21 +01:00
Add Record::truncate
for trimming based on len (#11004)
# Description Compatible with `Vec::truncate` and `indexmap::IndexMap::truncate` Found useful in #10903 for `drop column` # Tests + Formatting Doctest with the relevant edge-cases
This commit is contained in:
parent
0f600bc3f5
commit
cd75640a90
@ -203,6 +203,30 @@ impl Record {
|
||||
self.cols.truncate(retained);
|
||||
}
|
||||
|
||||
/// Truncate record to the first `len` elements.
|
||||
///
|
||||
/// `len > self.len()` will be ignored
|
||||
/// ```rust
|
||||
/// use nu_protocol::{record, Value};
|
||||
///
|
||||
/// let mut rec = record!(
|
||||
/// "a" => Value::test_nothing(),
|
||||
/// "b" => Value::test_int(42),
|
||||
/// "c" => Value::test_nothing(),
|
||||
/// "d" => Value::test_int(42),
|
||||
/// );
|
||||
/// rec.truncate(42); // this is fine
|
||||
/// assert_eq!(rec.columns().map(String::as_str).collect::<String>(), "abcd");
|
||||
/// rec.truncate(2); // truncate
|
||||
/// assert_eq!(rec.columns().map(String::as_str).collect::<String>(), "ab");
|
||||
/// rec.truncate(0); // clear the record
|
||||
/// assert_eq!(rec.len(), 0);
|
||||
/// ```
|
||||
pub fn truncate(&mut self, len: usize) {
|
||||
self.cols.truncate(len);
|
||||
self.vals.truncate(len);
|
||||
}
|
||||
|
||||
pub fn columns(&self) -> Columns {
|
||||
Columns {
|
||||
iter: self.cols.iter(),
|
||||
|
Loading…
Reference in New Issue
Block a user