underscore/docs/content/collections/containsby.md
Ruidy 1031038d42
feat: add Chunk, ContainsBy, UniqueBy, ParallelMap, map helpers
- 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`.
2025-09-01 18:03:38 -04:00

20 lines
327 B
Markdown

---
title: "ContainsBy"
date: 2025-09-01T00:00:00-00:00
---
`ContainsBy` returns true if any element satisfies the predicate.
```go
package main
import (
"fmt"
u "github.com/rjNemo/underscore"
)
func main() {
nums := []int{1, 3, 5, 8}
fmt.Println(u.ContainsBy(nums, func(n int) bool { return n%2 == 0 })) // true
}
```