diff --git a/lib/meta.js b/lib/meta.js
index a08ee57..6a45788 100644
--- a/lib/meta.js
+++ b/lib/meta.js
@@ -1,3 +1,5 @@
 module.exports = function (str) {
   // TODO
-}
\ No newline at end of file
+  var regx=/\.$/;
+  return regx.test(str);
+}
diff --git a/lib/quantifier.js b/lib/quantifier.js
index a08ee57..b3b1a41 100644
--- a/lib/quantifier.js
+++ b/lib/quantifier.js
@@ -1,3 +1,5 @@
 module.exports = function (str) {
   // TODO
-}
\ No newline at end of file
+  var regx=/^\d+\.(jpg|jpeg)$/;
+  return regx.test(str);
+}
diff --git a/lib/split.js b/lib/split.js
index a08ee57..7d832bf 100644
--- a/lib/split.js
+++ b/lib/split.js
@@ -1,3 +1,4 @@
 module.exports = function (str) {
   // TODO
-}
\ No newline at end of file
+  return str.split(/\s*,\s*/);
+}