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Learning To Walk In Shoes
The document discusses the features and capabilities of Ruby, emphasizing its dynamic, object-oriented nature and the importance of arrays and hashes. It introduces the Shoes framework, highlighting how it simplifies GUI creation by allowing Ruby code to work within a structured object. The document also touches on constructing layouts and handling user input while providing links to demos and additional resources.
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Editor's Notes
- #3 So, who is this guy? Visit http://www.napcs.com/ http://www.snippetstash.com/ http://www.feelmyskills.com/ http://www.webdesignfordevelopers.com
- #4 A talk about shoes would be completely inappropriate at a code camp. So we’re not talking about these kinds of shoes. Although, a search for shoes on Google will turn up lots of stuff like this.
- #5 We’re talking about Shoes, a cross-platform framework for making GUI apps, using the Ruby language.
- #6 It’s also incredibly easy to learn.
- #7 One of the nice things about Ruby is that it strives to be easy to read. Here, we’re declaring some variables and setting values.
- #8 Like most languages, you’ve got constants, local variables, and instance variables. The convention in Ruby is to use all capital letters for constants, but anything that starts with a capital letter is considered constant. You can actually change values of constants at runtime, but you will get a warning about that. Instance variables get the @ sign.
- #9 Anyone know what dynamically typed is? What’s the opposite of dynamically typed?
- #14 You’ll get a runtime error because you can’t add a string to a number
- #15 The to_s method converts many types of objects to strings.
- #16 You can embed any expression this way and it will automatically cast the value to a string, even if it’s a null value.
- #19 def is so much nicer than function.
- #21 There’s no such thing as a primitive in Ruby. Even a string or an integer is an object.
- #22 With methods, if it’s not explicit with a return, then the return value is the value of the last statement.
- #23 1 is true. 0 is not false.
- #25 The “java” way. This is on the way out because it’s stupid. Here we’re declaring instance variables, getters, and setters. Essentially creating properties.
- #26 attr_accessor creates variables, getters, and setters.
- #27 Metaprogramming!
- #28 They’re everywhere.
- #29 Square brackets denote hashes.
- #30 Curly braces and => are for hashes.
- #31 Hashrocket.
- #33 Only one parameter which is a hash. Hashes are amazing because you can actually send the parameters into a method in any order, and it’s nicely self-documenting. No referencing the api to figure out which parameter is the width.
- #34 Blocks are like closures or anonymous fuctions
- #35 We can use them for looping instead of having to track an array or hash position.
- #37 This is a standard pattern in Ruby classes.
- #38 Obligatory LOLCAT is obligatory!
- #44 Parenthesis are optional in many cases, especially when it’s obvious.
- #47 you’re supposed to BOO!
- #48 and no, this doesn’t excuse the bad joke.
- #75 Use the .text method to grab the text from the textbox.
- #77 The @names section contains the names we add, and names get added when we click the button.
- #78 Stacks and flows can be cleared as well. Clear can take a block which you can use to place new content in the stack or flow.
- #80 So instance variables are isolated.
- #82 We can use a nice MVC-style structure here. Notice that we can wrap blocks in methods so we can easily call them.
- #83 The video player plays mp3s, oggs, avis, movs, flvs and more.
- #86 There are hundreds of libraries out there for doing pretty much anything. Twitter, Youtube, Flickr, Last.fm, and anything in between.
- #87 When the app starts, these libraries get installed to the user’s home directory.
- #89 Accessing standard dialogs and the clipboard is pretty simple.
- #91 Either check it out with git or click the download link and unzip the package.