add slice check in and delete function

Author: phuhao00

map.go

@@ -20,11 +20,11 @@ func Values[K comparable, V any](in map[K]V) []V {
 	return result
 }
 
-func FiltrateBy[K comparable, V any](in map[K]V, fileter func(K, V) bool) map[K]V {
+func FiltrateBy[K comparable, V any](in map[K]V, filtrate func(K, V) bool) map[K]V {
 	result := map[K]V{}
 
 	for k, v := range in {
-		if fileter(k, v) {
+		if filtrate(k, v) {
 			result[k] = v
 		}
 	}

slice.go

@@ -1,11 +1,13 @@
 package sugar
 
-func SliceFileter[V any](collection []V, fileter func(V, int) bool) []V {
+import "golang.org/x/exp/constraints"
+
+func SliceFiltrate[V any](collection []V, filtrate func(V, int) bool) []V {
 
 	result := []V{}
 
 	for i, v := range collection {
-		if fileter(v, i) {
+		if filtrate(v, i) {
 			result = append(result, v)
 		}
 	}
@@ -48,3 +50,24 @@ func SliceGroupBy[T any, U comparable](collection []T, iteratee func(T) U) map[U
 	}
 	return result
 }
+
+//CheckInSlice  check value in slice
+func CheckInSlice[T constraints.Ordered](a T, s []T) bool {
+	for _, val := range s {
+		if a == val {
+			return true
+		}
+	}
+	return false
+}
+
+//DelOneInSlice  delete one element of slice  left->right
+func DelOneInSlice[T constraints.Ordered](a T, old []T) (new []T) {
+	for i, val := range old {
+		if a == val {
+			new = append(old[:i], old[i+1:]...)
+			return
+		}
+	}
+	return old
+}