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lo/docs/data/core-first.md
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Yuliya b6154d0f8d feat: add Take, TakeWhile, FilterTake, Window, and Sliding functions (#760)
* feat: add Take, TakeWhile, FilterTake, Window, and Sliding functions

Add five new slice manipulation functions with tests, examples, and documentation.

* improve Take function safety and add benchmarks

* rename FilterTake to TakeFilter and add README docs

* remove Window and Sliding benchmarks

* apply gofmt and fix linter errors

* apply gofmt and fix linter errors
2026-01-07 17:28:08 +01:00

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---
name: First
slug: first
sourceRef: find.go#L554
category: core
subCategory: find
playUrl: https://go.dev/play/p/ul45Z0y2EFO
variantHelpers:
- core#find#first
similarHelpers:
- core#slice#take
- core#slice#takewhile
- core#find#firstor
- core#find#firstorempty
- core#find#last
- core#find#lastor
- core#find#lastorempty
- core#find#nth
position: 260
signatures:
- "func First[T any](collection []T) (T, bool)"
---
Returns the first element of a collection and whether it exists.
```go
v, ok := lo.First([]int{1, 2, 3})
// v == 1, ok == true
```