5 More Ruby Tips

Yinquan Teo

twitter: @yinquanteo

github: github.com/yinquanteo

url: yinquanteo.com

1. HTTP Server

ruby -run -e httpd . -p 8080

http://ruby-doc.org/stdlib-2.0.0/libdoc/un/rdoc/Object.html#method-i-httpd

2. inline Heredoc

UGLY :(

module Adding  class SomeSpace    def ugly_text      <<HERESuch ugly indentationisn't it?HERE    end  endend

2. INLINE HEREDOC

pretty :)

module Adding  class SomeSpace    def beautiful_text      <<-HERE.strip_heredoc        Beautifully indented        isn't it?      HERE    end  endend

3. Ruby Scripting

 printf "super\nsize\nme" | ruby -ne 'puts $_.upcase'

4. URI Query PARAMS

hash to query params

require 'active_support/core_ext'params = {  scope: "read, write & profit",   url: "http://referralcandy.com"}params.to_query 
# => "scope=read%2C+write+%26+profit&url=http%3A%2F%2Freferralcandy.com"

4. URI QUERY PARAMS

query params to hash

require 'rack'query = "url=http%3A%2F%2Freferralcandy.com&scope=read%26profit"Rack::Utils.parse_nested_query(query)
# => {"url"=>"http://referralcandy.com", "scope"=>"read&profit"}

5. rescuing from exception

BAD

loop do
  begin    booom   rescue Exception => e   endend

RESCUE HIERARCHY

 Exception
  NoMemoryError
  ScriptError
    LoadError
    NotImplementedError
    SyntaxError
  SignalException
    Interrupt
  StandardError         
    ArgumentError
    IOError
      EOFError
    IndexError
    LocalJumpError
    NameError
      NoMethodError
    RangeError
      FloatDomainError
    RegexpError
    RuntimeError
      Timeout::Error
    SecurityError
    SocketError
    SystemCallError
    SystemStackError
    ThreadError
    TypeError
    ZeroDivisionError
  SystemExit
  fatal

Good

begin  booomrescue => eend

5 More Ruby Tips

Yinquan Teo

1. HTTP Server

2. inline Heredoc

2. INLINE HEREDOC

3. Ruby Scripting

4. URI Query PARAMS

4. URI QUERY PARAMS

5. rescuing from exception

RESCUE HIERARCHY

Good

QuESTIONS?

5 More Ruby Tips

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