From 37c00223d013da83d847767fbab6a3c4f960ad1a Mon Sep 17 00:00:00 2001
From: Rahil Momin <rahil.rules.you@gmail.com>
Date: Thu, 19 Mar 2015 15:38:16 +0530
Subject: add has_key? and has_value? methods on hashes

---
 ruby.html.markdown | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'ruby.html.markdown')

diff --git a/ruby.html.markdown b/ruby.html.markdown
index 800f0445..8c9d8fc5 100644
--- a/ruby.html.markdown
+++ b/ruby.html.markdown
@@ -191,6 +191,10 @@ new_hash = { defcon: 3, action: true }
 
 new_hash.keys #=> [:defcon, :action]
 
+# Check existence of keys and values in hash
+new_hash.has_key?(:defcon) #=> true
+new_hash.has_value?(3) #=> true
+
 # Tip: Both Arrays and Hashes are Enumerable
 # They share a lot of useful methods such as each, map, count, and more
 
-- 
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