builtin: add string.split_any/1 (#12720)

vlib/builtin/string.v

@@ -618,6 +618,36 @@ fn (s string) + (a string) string {
 	return res
 }
 
+// split_any splits the string to an array by any of the `delim` chars.
+// Example: "first row\nsecond row".split_any(" \n") == ['first', 'row', 'second', 'row']
+// Split a string using the chars in the delimiter string as delimiters chars.
+// If the delimiter string is empty then `.split()` is used.
+[direct_array_access]
+pub fn (s string) split_any(delim string) []string {
+	mut res := []string{}
+	mut i := 0
+	// check empty source string
+	if s.len > 0 {
+		// if empty delimiter string using defautl split
+		if delim.len <= 0 {
+			return s.split('')
+		}
+		for index, ch in s {
+			for delim_ch in delim {
+				if ch == delim_ch {
+					res << s[i..index]
+					i = index + 1
+					break
+				}
+			}
+		}
+		if i < s.len {
+			res << s[i..]
+		}
+	}
+	return res
+}
+
 // split splits the string to an array by `delim`.
 // Example: assert 'A B C'.split(' ') == ['A','B','C']
 // If `delim` is empty the string is split by it's characters.

vlib/builtin/string_test.v

@@ -229,6 +229,17 @@ fn test_split() {
 	assert vals[1] == ''
 }
 
+fn test_split_any() {
+	assert 'ABC'.split_any('') == ['A', 'B', 'C']
+	assert ''.split_any(' ') == []
+	assert ' '.split_any(' ') == ['']
+	assert '  '.split_any(' ') == ['', '']
+	assert 'Ciao come stai? '.split_any(' ') == ['Ciao', 'come', 'stai?']
+	assert 'Ciao+come*stai? '.split_any('+*') == ['Ciao', 'come', 'stai? ']
+	assert 'Ciao+come*stai? '.split_any('+* ') == ['Ciao', 'come', 'stai?']
+	assert 'first row\nsecond row'.split_any(' \n') == ['first', 'row', 'second', 'row']
+}
+
 fn test_trim_space() {
 	a := ' a '
 	assert a.trim_space() == 'a'