mirror of
https://github.com/samber/lo.git
synced 2026-04-22 23:47:11 +08:00
Samuel Berthe
55 lines
1.2 KiB
Markdown
55 lines
1.2 KiB
Markdown
---
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name: FindDuplicates
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slug: findduplicates
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sourceRef: it/find.go#L196
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category: it
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subCategory: find
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signatures:
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- "func FindDuplicates[T comparable, I ~func(func(T) bool)](collection I) I"
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playUrl: "https://go.dev/play/p/1YsRLPl-wx"
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variantHelpers:
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- it#find#findduplicates
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similarHelpers:
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- core#slice#findduplicates
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- it#find#finduniques
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- it#find#findduplicatesby
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position: 90
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---
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Returns the first occurrence of each duplicated element in the collection (elements that appear more than once).
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Examples:
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```go
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seq := func(yield func(int) bool) {
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_ = yield(1)
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_ = yield(2)
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_ = yield(2)
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_ = yield(3)
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_ = yield(4)
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_ = yield(4)
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_ = yield(4)
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}
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dupSeq := it.FindDuplicates(seq)
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var result []int
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for v := range dupSeq {
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result = append(result, v)
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}
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// result contains 2, 4 (first occurrence of each duplicated element)
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```
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```go
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seq := func(yield func(string) bool) {
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_ = yield("apple")
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_ = yield("banana")
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_ = yield("apple")
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_ = yield("cherry")
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_ = yield("banana")
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}
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dupSeq := it.FindDuplicates(seq)
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var result []string
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for v := range dupSeq {
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result = append(result, v)
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}
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// result contains "apple", "banana" (duplicated elements)
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``` |