Fixes cache bug.

Signed-off-by: Eric Wang <skygragon@gmail.com>

Author: skygragon

lib/commands/cache.js

@@ -34,9 +34,13 @@ const cmd = {
 cmd.handler = function(argv) {
   session.argv = argv;
 
+  const name = argv.keyword;
+  const isInteger = Number.isInteger(Number(name));
+
   const caches = cache.list()
     .filter(function(f) {
-      return argv.keyword.length === 0 || f.name.startsWith(argv.keyword + '.');
+      return (name.length === 0) ||
+        (isInteger ? f.name.startsWith(name + '.') : f.name === name);
     });
 
   if (argv.delete) {