softprops

class Object
  # http://stuff.lilleaas.net/rescue_nil_is_not_awesome
  def try(*args, &block)
    return if self.nil?
    block_given? ? yield(self) : self.__send__(args.shift, *args)
  end
end

# or

softprops

/** require yo js foo */
function require(url, afterLoaded){
  var scriptTag = document.createElement("script");
  scriptTag.type = "text/javascript";
  if(scriptTag.readyState) { /* IE */
    scriptTag.onreadystatechange = function() {
      if(/^(loaded|complete)/.test(scriptTag.readyState)) {
        scriptTag.onreadystatechange = null;
        afterLoaded();
      }

softprops

• javascriptcompressor
• jslint

softprops

*var = 1, 2, 3 #=> [1, 2, 3]

*[1, 2, 3] #=> 1, 2, 3

def foo(a, b, c)
end

foo(%w(1 2 3)) # ArgumentError: wrong number of arguments (1 for 3)
foo(*%w(1 2 3)) # ok

softprops

#! /bin/bash

myen0=`ifconfig en0 | grep "inet " | grep -v 127.0.0.1 | awk '{print $2}'`

if [ "$myen0" != "" ]
then
    echo "$myen0"
fi

myen1=`ifconfig en1 | grep "inet " | grep -v 127.0.0.1 | awk '{print $2}'`

softprops

class ::Object 
  # A shorthand for accessing a Classes hidden class
  # This useful for defining class methods on the fly
  def metaclass
    class << self
      self
    end
  end

  # As a singleton class method to a Class

softprops

// how do you initialize a map whose keys are the members of a list?

val cats = List('maki, 'unagi, 'shoyu)

// #map will return a List of Tuples
cats map (_ -> Nil) // List[(Symbol, object Nil)] = List(('maki,List()), ('unagi,List()), ('shoyu,List()))

// Map(tuples, _*)
Map(cats map (_ -> Nil): _*) // scala.collection.immutable.Map[Symbol,object Nil] = Map('maki -> List(), 'unagi -> List(), 'shoyu -> List())

softprops

class Proxy
  instance_methods.each { |m| undef_method m unless m =~ /(^__|^send$|^object_id$)/ }

  def initialize(obj)
   @obj = obj
  end

  def sprinkle
    # adds some sprinkles
  end

softprops

val list = 1 to 4 toList

1 to 10 foreach ((_:Any) match { 
  case n: Int if list.exists(_==n) => println("%s -> y" format n) 
  case _ => println("n") 
})

softprops

select if(somebool, 'true', 'false') from some_table;