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https://github.com/rjNemo/underscore
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Ruidy
1031038d42
- Add `Chunk` to split slices into groups of size n. - Add `ContainsBy` for predicate-based containment checks. - Add `UniqueBy` to deduplicate slices by key selector. - Add `ParallelMap` for concurrent mapping with context and error handling. - Add `maps.Keys` and `maps.Values` helpers for extracting map keys/values. - Update README and docs for new features. - Refactor `Contains` to use `slices.Contains`.
483 B
483 B
| title | date |
|---|---|
| UniqueBy | 2025-09-01T00:00:00-00:00 |
UniqueBy returns a duplicate-free version of the slice using a key selector.
Order is preserved; the first occurrence of each key is kept.
package main
import (
"fmt"
u "github.com/rjNemo/underscore"
)
type User struct{ ID int; Email string }
func main() {
users := []User{{1, "a@x"}, {2, "b@x"}, {3, "a@x"}}
fmt.Println(u.UniqueBy(users, func(u User) string { return u.Email }))
// [{1 a@x} {2 b@x}]
}