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-rw-r--r--ruby.html.markdown22
1 files changed, 17 insertions, 5 deletions
diff --git a/ruby.html.markdown b/ruby.html.markdown
index 998b4bf7..3eed2d3c 100644
--- a/ruby.html.markdown
+++ b/ruby.html.markdown
@@ -14,6 +14,7 @@ contributors:
- ["Rahil Momin", "https://github.com/iamrahil"]
- ["Gabriel Halley", "https://github.com/ghalley"]
- ["Persa Zula", "http://persazula.com"]
+ - ["Jake Faris", "https://github.com/farisj"]
---
```ruby
@@ -41,7 +42,11 @@ You shouldn't either
35 / 5 #=> 7
2**5 #=> 32
5 % 3 #=> 2
-5 ^ 6 #=> 3
+
+# Bitwise operators
+3 & 5 #=> 1
+3 | 5 #=> 7
+3 ^ 5 #=> 6
# Arithmetic is just syntactic sugar
# for calling a method on an object
@@ -49,7 +54,7 @@ You shouldn't either
10.* 5 #=> 50
# Special values are objects
-nil # Nothing to see here
+nil # equivalent to null in other languages
true # truth
false # falsehood
@@ -77,6 +82,11 @@ false.class #=> FalseClass
2 <= 2 #=> true
2 >= 2 #=> true
+# Combined comparison operator
+1 <=> 10 #=> -1
+10 <=> 1 #=> 1
+1 <=> 1 #=> 0
+
# Logical operators
true && false #=> false
true || false #=> true
@@ -122,7 +132,7 @@ puts "I'm printing!"
# print to the output without a newline
print "I'm printing!"
-#=> I'm printing! => nill
+#=> I'm printing! => nil
# Variables
x = 25 #=> 25
@@ -220,8 +230,8 @@ 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
+new_hash.key?(:defcon) #=> true
+new_hash.value?(3) #=> true
# Tip: Both Arrays and Hashes are Enumerable
# They share a lot of useful methods such as each, map, count, and more
@@ -579,7 +589,9 @@ Something.new.qux # => 'qux'
## Additional resources
- [Learn Ruby by Example with Challenges](http://www.learneroo.com/modules/61/nodes/338) - A variant of this reference with in-browser challenges.
+- [An Interactive Tutorial for Ruby](https://rubymonk.com/) - Learn Ruby through a series of interactive tutorials.
- [Official Documentation](http://www.ruby-doc.org/core-2.1.1/)
- [Ruby from other languages](https://www.ruby-lang.org/en/documentation/ruby-from-other-languages/)
- [Programming Ruby](http://www.amazon.com/Programming-Ruby-1-9-2-0-Programmers/dp/1937785491/) - An older [free edition](http://ruby-doc.com/docs/ProgrammingRuby/) is available online.
- [Ruby Style Guide](https://github.com/bbatsov/ruby-style-guide) - A community-driven Ruby coding style guide.
+- [Try Ruby](http://tryruby.org) - Learn the basic of Ruby programming language, interactive in the browser.