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Samuel Berthe
fa095e4b4f
* fix(doc): fix go playground demo URL * fix(doc): add more go playground demo URL
48 lines
1.2 KiB
Markdown
48 lines
1.2 KiB
Markdown
---
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name: MinByErr
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slug: minbyerr
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sourceRef: find.go#L349
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category: core
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subCategory: find
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playUrl: https://go.dev/play/p/nvDYGS8q895
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variantHelpers:
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- core#find#minbyerr
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similarHelpers:
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- core#find#minby
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- core#find#min
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- core#find#minindex
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- core#find#minindexby
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- core#find#max
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- core#find#maxby
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- core#find#maxindex
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- core#find#maxindexby
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position: 161
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signatures:
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- "func MinByErr[T any](collection []T, comparison func(a T, b T) (bool, error)) (T, error)"
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---
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Searches the minimum value of a collection using the given comparison function. Returns the first minimal value; zero value and nil error when empty.
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If the comparison function returns an error, iteration stops and the error is returned.
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```go
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type Point struct{ X int }
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min, err := lo.MinByErr([]Point{{1}, {5}, {3}}, func(a, b Point) (bool, error) {
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return a.X < b.X, nil
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})
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// {1}, <nil>
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```
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Example with error:
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```go
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type Point struct{ X int }
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min, err := lo.MinByErr([]Point{{1}, {5}, {3}}, func(a, b Point) (bool, error) {
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if a.X == 5 {
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return false, fmt.Errorf("cannot compare with 5")
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}
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return a.X < b.X, nil
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})
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// {0}, error("cannot compare with 5")
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```
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