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| -rw-r--r-- | ruby.html.markdown | 4 |
1 files changed, 4 insertions, 0 deletions
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 |