added FindFirstIndex and FindLastIndex

- removed Search

filter.go

@@ -9,3 +9,30 @@ 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
+}

search.go

@@ -1,11 +0,0 @@
-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
-}