builtin: add string.contains_any() (#5963)

vlib/builtin/string.v

@@ -743,16 +743,37 @@ pub fn (s string) count(substr string) int {
 	return 0 // TODO can never get here - v doesn't know that
 }
 
-pub fn (s string) contains(p string) bool {
+pub fn (s string) contains(substr string) bool {
-	if p.len == 0 {
+	if substr.len == 0 {
 		return true
 	}
-	s.index(p) or {
+	s.index(substr) or {
 		return false
 	}
 	return true
 }
 
+pub fn (s string) contains_any(chars string) bool {
+	for c in chars {
+		if c.str() in s {
+			return true
+		}
+	}
+	return false
+}
+
+pub fn (s string) contains_any_substr(substrs []string) bool {
+	if substrs.len == 0 {
+		return true
+	}
+	for sub in substrs {
+		if s.contains(sub) {
+			return true
+		}
+	}
+	return false
+}
+
 pub fn (s string) starts_with(p string) bool {
 	if p.len > s.len {
 		return false

vlib/builtin/string_test.v

@@ -361,6 +361,23 @@ fn test_contains() {
 	assert 'abc'.contains('')
 }
 
+fn test_contains_any() {
+	assert !'team'.contains_any('i')
+	assert 'fail'.contains_any('ui')
+	assert 'ure'.contains_any('ui')
+	assert 'failure'.contains_any('ui')
+	assert !'foo'.contains_any('')
+	assert !''.contains_any('')
+}
+
+fn test_contains_any_substr() {
+	s := 'Some random text'
+	assert s.contains_any_substr(['false', 'not', 'rand'])
+	assert !s.contains_any_substr(['ABC', 'invalid'])
+	assert ''.contains_any_substr([])
+	assert 'abc'.contains_any_substr([''])
+}
+
 fn test_arr_contains() {
 	a := ['a', 'b', 'c']
 	assert a.contains('b')