Rich-T-kid commented on code in PR #10695:
URL: https://github.com/apache/arrow-rs/pull/10695#discussion_r3789599853
##########
arrow-schema/src/metadata.rs:
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@@ -146,6 +146,19 @@ impl Metadata {
pub fn values(&self) -> impl Iterator<Item = &String> {
self.iter().map(|(_, value)| value)
}
+
+ /// Retains only the entries for which `f(&key, &mut value)` returns
`true`.
+ ///
+ /// Entries for which `f` returns `false` are removed. Retained entries
+ /// remain in their original (sorted) order.
+ ///
+ /// Clones the underlying map if (and only if) it is shared.
+ pub fn retain<F>(&mut self, eq: F)
+ where
+ F: FnMut(&String, &mut String) -> bool,
+ {
+ Arc::make_mut(self.0.get_or_insert_default()).retain(eq);
Review Comment:
ah good catch!
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