filter.go

@@ -9,30 +9,3 @@ func Filter[T any](slice []T, f func(T) bool) []T {
 	}
 	return ret
 }
-
-func FindFirst[T any](slice []T, f func(T) bool) (T, bool) {
-	for _, v := range slice {
-		if f(v) {
-			return v, true
-		}
-	}
-	return *new(T), false
-}
-
-func FindFirstIndex[T any](slice []T, f func(T) bool) (int, bool) {
-	for i, v := range slice {
-		if f(v) {
-			return i, true
-		}
-	}
-	return -1, false
-}
-
-func FindLastIndex[T any](slice []T, f func(T) bool) (int, bool) {
-	for i := len(slice); i >= 0; i-- {
-		if f(slice[i]) {
-			return i, true
-		}
-	}
-	return -1, false
-}

map.go

@@ -7,15 +7,3 @@ func Map[I, O any](slice []I, mapper func(I) O) []O {
 	}
 	return ret
 }
-
-func MapError[I, O any](slice []I, mapper func(I) (O, error)) ([]O, error) {
-	ret := make([]O, 0, len(slice))
-	for _, old := range slice {
-		new, err := mapper(old)
-		if err != nil {
-			return nil, err
-		}
-		ret = append(ret, new)
-	}
-	return ret, nil
-}

of.go

@@ -14,15 +14,3 @@ func OfMap[K comparable, V, T any](m map[K]V, unmapper func(K, V) T) []T {
 	}
 	return out
 }
-
-// UnmapKey is an unmapper function which returns the map key only
-// and discards its value. It is supposed to be used with OfMap
-func UnmapKey[K comparable, V any](key K, _ V) K {
-	return key
-}
-
-// UnmapValue is an unmapper function which returns the map value only
-// and discards its key. It is supposed to be used with OfMap
-func UnmapValue[K comparable, V any](_ K, value V) V {
-	return value
-}

search.go

@@ -0,0 +1,11 @@
+package slices
+
+func Search[T any](slice []T, f func(a, b T) T) T {
+	if len(slice) == 0 {
+		return *new(T)
+	}
+
+	value := slice[0]
+	Each(slice, func(v T) { value = f(value, v) })
+	return value
+}