strings: add strings helpers for prefixes and suffixes

Signed-off-by: guoguangwu <guoguangwug@gmail.com>

src/strings/example_test.go

@@ -172,6 +172,15 @@ func ExampleHasPrefix() {
 	// true
 }
 
+func ExampleHasAnyOfPrefixes() {
+	fmt.Println(strings.HasAnyOfPrefixes("Gopher", "Go", "pher"))
+	fmt.Println(strings.HasAnyOfPrefixes("Gopher", "C", "D"))
+	fmt.Println(strings.HasAnyOfPrefixes("Gopher", ""))
+	// Output:
+	// true
+	// false
+	// true
+}
 func ExampleHasSuffix() {
 	fmt.Println(strings.HasSuffix("Amigo", "go"))
 	fmt.Println(strings.HasSuffix("Amigo", "O"))
@@ -184,6 +193,17 @@ func ExampleHasSuffix() {
 	// true
 }
 
+func ExampleHasAnyOfSuffixes() {
+	fmt.Println(strings.HasAnyOfSuffixes("Amigo", "go", "Am"))
+	fmt.Println(strings.HasAnyOfSuffixes("Amigo", "O", "p"))
+	fmt.Println(strings.HasAnyOfSuffixes("Amigo", "Ami", "Am"))
+	fmt.Println(strings.HasAnyOfSuffixes("Amigo", ""))
+	// Output:
+	// true
+	// false
+	// false
+	// true
+}
 func ExampleIndex() {
 	fmt.Println(strings.Index("chicken", "ken"))
 	fmt.Println(strings.Index("chicken", "dmr"))

src/strings/strings.go

@@ -468,6 +468,28 @@ func HasSuffix(s, suffix string) bool {
 	return len(s) >= len(suffix) && s[len(s)-len(suffix):] == suffix
 }
 
+// HasAnyOfSuffixes returns true if the given string has any of the given suffixes.
+func HasAnyOfSuffixes(input string, suffixes ...string) bool {
+	for _, suffix := range suffixes {
+		if HasSuffix(input, suffix) {
+			return true
+		}
+	}
+
+	return false
+}
+
+// HasAnyOfPrefixes returns true if the given string has any of the given prefixes.
+func HasAnyOfPrefixes(input string, prefixes ...string) bool {
+	for _, prefix := range prefixes {
+		if HasPrefix(input, prefix) {
+			return true
+		}
+	}
+
+	return false
+}
+
 // Map returns a copy of the string s with all its characters modified
 // according to the mapping function. If mapping returns a negative value, the character is
 // dropped from the string with no replacement.