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authorGeoff Liu <g@geoffliu.me>2015-04-17 14:06:47 -0400
committerGeoff Liu <g@geoffliu.me>2015-04-17 14:06:47 -0400
commit49e8dd42636199f19d250bc6b169764f5ebe0ed7 (patch)
tree4a91f68d8c75720eb8c1cf288fcbeba0f841e62c /ruby.html.markdown
parent61510ee92caaca9c841da6e40c8e1d680d1b7e34 (diff)
parentb44aded453d94d5a196356f3c05c678d6ec9323c (diff)
Merge remote-tracking branch 'upstream/master'
Diffstat (limited to 'ruby.html.markdown')
-rw-r--r--ruby.html.markdown8
1 files changed, 8 insertions, 0 deletions
diff --git a/ruby.html.markdown b/ruby.html.markdown
index 1883d1ad..792c9c95 100644
--- a/ruby.html.markdown
+++ b/ruby.html.markdown
@@ -11,6 +11,7 @@ contributors:
- ["Ariel Krakowski", "http://www.learneroo.com"]
- ["Dzianis Dashkevich", "https://github.com/dskecse"]
- ["Levi Bostian", "https://github.com/levibostian"]
+ - ["Rahil Momin", "https://github.com/iamrahil"]
---
@@ -169,6 +170,9 @@ array[1..3] #=> [2, 3, 4]
# Add to an array like this
array << 6 #=> [1, 2, 3, 4, 5, 6]
+# Check if an item exists in an array
+array.include?(1) #=> true
+
# Hashes are Ruby's primary dictionary with keys/value pairs.
# Hashes are denoted with curly braces:
hash = { 'color' => 'green', 'number' => 5 }
@@ -188,6 +192,10 @@ 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