@@ -2,10 +2,17 @@
* Exercises - Ruby
************************************************
-Note that the exercises generally tend to get more difficult with higher numbers and with
-higher letters. If you find yourself stuck on say a c) or d) exercise, you can
+The exercises generally tend to get more difficult with higher numbers and with
+higher letters. If you find yourself stuck on for example the d) exercise, you can
always move on to the next number.
+As an alternative or complement to those exercises, you might want to check out the
+"Ruby in 20 Minutes" tutorial:
+
+http://www.ruby-lang.org/en/documentation/quickstart/
+
+Also, note that there is a nice introduction to Ruby in Appendix A of the Rails book.
+
1. a)
Create a new script exercies/hello.rb that outputs Hello World!
Execute your script with ruby exercies/hello.rb
exercises/ruby.txt
@@ -242,6 +242,24 @@ puts "paid=#{person.paid}"
</div>
<div class="slide">
+ <h1>Methods and Parenthesis</h1>
+
+
+<div class="code-normal">
+
+<pre name="code" class="ruby:nogutter:nocontrols">
+
+def square(number)
+ number * number
+end
+
+square(2+2)*2 # => square(4)*2 = 32
+square (2+2)*2 # => square(4*2) = 64
+</pre></div>
+
+</div>
+<div class="slide">
+
<h1>Method Visibility</h1>
html/ruby.html
@@ -59,6 +59,17 @@ h1. Methods
* The last evaluated expression in a method is the return value
* Arguments can have default values: def my_method(a, b = {})
+h1. Methods and Parenthesis
+
+:inlinecode
+def square(number)
+ number * number
+end
+
+square(2+2)*2 # => square(4)*2 = 32
+square (2+2)*2 # => square(4*2) = 64
+:endinlinecode
+
h1. Method Visibility
:inlinecode
slides/ruby.slides
5b30b88286940d59a6324a012966aa2481cc0e88
Peter Marklund
peter_marklund@fastmail.fm
http://github.com/peter/rails101/commit/afd5d3e29d772e355d4c1ac6870e616a5075b817
afd5d3e29d772e355d4c1ac6870e616a5075b817
2009-02-21T02:09:22-08:00
2009-02-21T02:09:22-08:00
Added slide about Ruby methods and parenthesis
835c0f33734cdd972b60ac158c3398c00e757bb6
Peter Marklund
peter_marklund@fastmail.fm