44 lines
944 B
Go
44 lines
944 B
Go
package h
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// Unique returns a new slice with only unique items.
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func Unique[T any](slice []T, key func(item T) string) []T {
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var result []T
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seen := make(map[string]bool)
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for _, v := range slice {
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k := key(v)
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if _, ok := seen[k]; !ok {
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seen[k] = true
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result = append(result, v)
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}
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}
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return result
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}
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func Find[T any](slice []T, predicate func(item *T) bool) *T {
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for _, v := range slice {
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if predicate(&v) {
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return &v
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}
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}
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return nil
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}
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// Filter returns a new slice with only items that match the predicate.
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func Filter[T any](slice []T, predicate func(item T) bool) []T {
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var result []T
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for _, v := range slice {
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if predicate(v) {
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result = append(result, v)
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}
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}
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return result
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}
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// Map returns a new slice with the results of the mapper function.
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func Map[T, U any](slice []T, mapper func(item T) U) []U {
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var result []U
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for _, v := range slice {
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result = append(result, mapper(v))
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}
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return result
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}
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