From 11350e83d965fd5d9d62324016434c4e5f1123d1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nicol=C3=A1s=20G=C3=B3mez?= <nggomez@uc.cl>
Date: Wed, 11 Apr 2018 10:50:45 -0300
Subject: [PATCH] fix: rails 4.0.x

Patch time_atts when `compact` is not defined in Hash class.
---
 lib/crono/period.rb | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/crono/period.rb b/lib/crono/period.rb
index 802145e..ffa9b62 100644
--- a/lib/crono/period.rb
+++ b/lib/crono/period.rb
@@ -78,7 +78,8 @@ module Crono
     end
 
     def time_atts
-      { hour: @at_hour, min: @at_min }.compact
+      atts = { hour: @at_hour, min: @at_min }
+      atts.respond_to?(:compact) ? atts.compact : atts.select { |_, value| !value.nil? }
     end
   end
 end