regexp

9-regular-expressions/11-regexp-groups/03-find-decimal-numbers/solution.md

@@ -0,0 +1,11 @@
+A positive number with an optional decimal part is (per previous task): `pattern:\d+(\.\d+)?`.
+
+Let's add the optional `pattern:-` in the beginning:
+
+```js run
+let reg = /-?\d+(\.\d+)?/g;
+
+let str = "-1.5 0 2 -123.4.";
+
+alert( str.match(reg) );   // -1.5, 0, 2, -123.4
+```