new function for regex execution

README.md

@@ -17,4 +17,11 @@ const obj = {foo:'bar'};
 const copy = util.copy_object(obj);
 copy.foo = 'baz';
 console.log(obj.foo); // bar
+
+// run a regular expression and get a callback for every result
+const data = "foobarfoo";
+const regex = /foo/g;
+util.run_regex(regex, data, res => {
+  console.log(res[0]); // will output 'foo' 2 times
+});
 ```

index.js

@@ -45,8 +45,26 @@ function copy_object (obj) {
   return JSON.parse (JSON.stringify (obj));
 }
 
+/**
+ * run a regular expression and callback for every result
+ *
+ * @param regex regular expression
+ * @param data data to run on
+ * @param func function to execute
+ */
+function run_regex (regex, data, func) {
+  let res = regex.exec (data);
+  while (res) {
+    func (res);
+    res = regex.exec (data);
+  }
+}
+
+
+
 module.exports = {
   truncate_decimal,
   try_parse_json,
-  copy_object
+  copy_object,
+  run_regex
 };