Ruby1.9.1

Ruby1.9.1
Brad Feeley

Ruby1.9.1
Brad Feeley
I work at Digitaria

Ruby1.9.1
What is it?

Ruby1.9.1
What is it?
“ Ruby 1.9 is a new series of Ruby. It is modern,
faster, with clearer syntax, multilingualized,
a much improved version of Ruby.

Ruby1.9.1
Faster JRuby

Ruby1.9.1
Faster
New virtual machine YARV

Ruby1.9.1
Faster Maybe another
presentation?
New virtual machine YARV
Kernal (native) threads

Ruby1.9.1
Multilingualized
a.k.a. m17n

Ruby1.9.1
Multilingualized
File Level Encoding

Ruby1.9.1
Multilingualized
File Level Encoding
# encodeing: utf-8
alias π = Math::PI

Ruby1.9.1
Multilingualized
String Level Encoding

Ruby1.9.1
Multilingualized
String Level Encoding
my_string.encode(“iso-8859-1”)

Ruby1.9.1
Multilingualized
IO Level Encoding

Ruby1.9.1
Multilingualized
IO Level Encoding
f.open(‘file.txt’, ‘r:ascii’)
data = f.read
data.encoding.name
# => ‘US-ASCII’

Ruby1.9.1
Cleaner Syntax

Cleaner Syntax
Ruby1.9.1
String
No longer Enumerable

Cleaner Syntax
Ruby1.9.1
String
No longer Enumerable
1.8 String.ancestors
=> [String, Enumerable, Comparable, Object, Kernel]
1.9 String.ancestors
=> [String, Comparable, Object, Kernel]

Cleaner Syntax
Ruby1.9.1
String
No longer Enumerable
1.8 my_string_var.each { |line| puts line }
1.9 my_string_var.each_line { |line| puts line }

Cleaner Syntax
Ruby1.9.1
String
str = “test”
str.clear # => “”
“hello\\nworld”.lines # => [“hello\\n”, “world”]
“hello”.encoding # => “UTF-8”
“kitty”.start_with? “cat” # => false
“kitty”.end_with? “tty” # => true

Cleaner Syntax
Ruby1.9.1
Array

Cleaner Syntax
Ruby1.9.1
Array
vowels = ['a','e','i', ‘o’, ‘u’]
vowels.index{|letter| letter == 'e'} # => 1
a = [1,2,3]
a.permutation(2).to_a #=> [[1,2],[1,3],[2,1],[2,3],[3,1],[3,2]]
a.combination(2).to_a #=> [[1, 2], [1, 3], [2, 3]]
a.to_s # => “[1, 2, 3]”
a.pop(2) #=> [2, 3]

Cleaner Syntax
Ruby1.9.1
Hash

Cleaner Syntax
Ruby1.9.1
Hash
New Key Value Syntax

Cleaner Syntax
Ruby1.9.1
Hash
New Key Value Syntax
1.8 render :action => ‘new’

Cleaner Syntax
Ruby1.9.1
Hash
New Key Value Syntax
1.8 render :action => ‘new’
1.9 render action: ‘new’

Cleaner Syntax
Ruby1.9.1
Hash
Order Preservation
h = {:a => 1, :b => 2, :c => 3 }
h[:d] = 4
1.8 puts h.inspect => {:4 => d, :a => 1, :b => 2, :c => 3 }

Cleaner Syntax
Ruby1.9.1
Hash
Order Preservation
h = {:a => 1, :b => 2, :c => 3 }
h[:d] = 4
1.8 puts h.inspect => {:4 => d, :a => 1, :b => 2, :c => 3 }
1.9 puts h.inspect => {:a => 1, :b => 2, :c => 3, :4 => d }

Cleaner Syntax
Ruby1.9.1
Proc

Cleaner Syntax
Ruby1.9.1
Proc
New Declaration Syntax
1.8 say_hi = lambda { |a| “Hello, #{a}” }

Cleaner Syntax
Ruby1.9.1
Proc
New Declaration Syntax
1.8 say_hi = lambda { |a| “Hello, #{a}” }
1.9 say_hi = ->(a){ “Hello, #{a}” }

Cleaner Syntax
Ruby1.9.1
Proc
New Declaration Syntax
1.8 a = lambda { |x, y=1| x * y } #=> ERROR

Cleaner Syntax
Ruby1.9.1
Proc
New Declaration Syntax
1.8 a = lambda { |x, y=1| x * y } #=> ERROR
1.9 a = ->(x, y=1){ x * y }
a = ->(&x){ x.call }

Cleaner Syntax
Ruby1.9.1
Proc
New Calling Syntax
say_hi = lambda { |a| “Hello, #{a}” }
1.8 say_hi.call(‘Quentin’) # => Hello, Quentin

Cleaner Syntax
Ruby1.9.1
Proc
New Calling Syntax
say_hi = lambda { |a| “Hello, #{a}” }
1.8 say_hi.call(‘Quentin’) # => Hello, Quentin
1.9 say_hi.(‘Quentin’) # => Hello, Quentin

Cleaner Syntax
Ruby1.9.1
Block Scope
n = “Hello, World!”
[1,2,3].each do |n|
#do something
end

Cleaner Syntax
Ruby1.9.1
Block Scope
n = “Hello, World!”
[1,2,3].each do |n|
#do something
end
1.8 puts n # => 3

Cleaner Syntax
Ruby1.9.1
Block Scope
n = “Hello, World!”
[1,2,3].each do |n|
#do something
end
1.8 puts n # => 3
1.9 puts n # => “Hello, World!”

Cleaner Syntax
Ruby1.9.1
Debugging

Cleaner Syntax
Ruby1.9.1
Debugging
-w whitespace

Cleaner Syntax
Ruby1.9.1
Debugging
-w whitespace
Method#owner
#=> module the method belongs to
Method#source_location
#=> where the method is defined

Ruby1.9.1
Installation
http://gist.github.com/59130
wget ftp://ftp.ruby-lang.org/pub/ruby/1.9/ruby-1.9.1-p0.tar.bz2
tar -xjvf ruby-1.9.1-p0.tar.bz2
cd ruby-1.9.1-p0
./configure --prefix=/usr --program-suffix=19 --enable-shared
make && make install

Ruby1.9.1
Ruby on Rails

Ruby1.9.1
Resources
•http://www.google.com

Ruby1.9.1
Questions?