From faf2f9920e0beca479feb3192e9b6b3d8bf85d72 Mon Sep 17 00:00:00 2001
From: joe-conigliaro <joe-conigliaro@users.noreply.github.com>
Date: Sat, 3 Aug 2019 07:30:22 +1000
Subject: [PATCH] string.v: string.count(substr)

---
 vlib/builtin/string.v | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/vlib/builtin/string.v b/vlib/builtin/string.v
index 45443bce76..6670e5c888 100644
--- a/vlib/builtin/string.v
+++ b/vlib/builtin/string.v
@@ -454,6 +454,22 @@ pub fn (s string) index_after(p string, start int) int {
 	return -1
 }
 
+// counts occurrences of substr in s
+pub fn (s string) count(substr string) int {
+	if s.len == 0 || substr.len == 0 {
+		return 0
+	}
+	mut n := 0
+	for {
+		i := s.index(substr)
+		if i == -1 {
+			return n
+		}
+		n++
+		s = s.right(i+substr.len)
+	}
+}
+
 pub fn (s string) contains(p string) bool {
 	res := s.index(p) > 0 - 1
 	return res