chrisjpowers

class Hash
  def map_values
    h = {}; self.each_pair { |k,v| h[k] = yield(v) }; h
  end
end

[ 'asdf', 'qwer' ].map{ |val| val * 2 }
  # => [ 'asdfasdf', 'qwerqwer' ]

{ :one => 'asdf', :two => 'qwer' }.map{ |val| val * 2 }

chrisjpowers

# Allows you to declare an alias_method_chain before the original 
# method has been defined.
#
#   class A
#     delayed_method_chain :name, :hello
#       
#     def name_with_hello
#       "Hello #{name_without_hello}"
#     end
#     

chrisjpowers

// If console is not defined (ie the browser isn't 
// using developer extensions), this will keep console
// statements accidentally left in the code from
// causing errors for the end user.
//
if(console == null) {
  var console = {
    log: function() {
      // do nothing
    }

chrisjpowers

function do_something(num, callback) {
  // arbitrary logic here
  num += 1;
  // end arbitrary logic
  return callback(num); // or you could do callback.call(this, num)
}

do_something(5, function(new_num) {
  alert("After complex arbitrary logic, num is " + new_num);
});

chrisjpowers

module AutoAssetsHelper
  
  # Outputs script and link tags for js/css based on 
  # the current action, controller and layout. This 
  # should be preferred over adding assets within a 
  # view file for specific views/layouts/controllers.
  # 
  # Example: If UsersController#dashboard is requested 
  # and it uses the 'front' layout, these files will be 
  # included if they exist:

chrisjpowers

// This function returns a new function that will run
// the given function in the context of the given scope
// ie 'this' will be whatever you pass in as 'scope'
function scoped(fn, scope) {
  return function () {
    return fn.apply(scope, arguments);
  }
}

var Obj = {

chrisjpowers

require 'rubygems'
require 'chronic'

# This has historically worked, but today, not so much
Chronic.parse "next Monday 4:00am" #=> nil

# Though it works fine in the afternoon
Chronic.parse "next Monday 4:00pm" #=> Mon Nov 08 16:00:00 -0600 2010

# Doesn't work on Tuesday either

chrisjpowers

// Example taken from the CouchDB Pages app (though they used this inside a show page,
// while I'm using it on a list page -- could be part of the problem?). 
//
// I get this same error any time that I return an object (rather than just a body string)
// inside a list function.

function(head, req) {
  return {
    code : 301,
    headers : {

chrisjpowers

class A
  def hello
    "hello from A"
  end
end

class B
  def hello
    "hello from B"
  end

chrisjpowers

module SavingWithoutCallbacks
  def save_without_callbacks
    raise "Only works for saved records" if new_record?
    updates = {}
    changes.each {|key, tuple| updates[key] = tuple.last}
    self.class.update_all(updates, {:id => self.id}, {:limit => 1})
  end
end

ActiveRecord::Base.send :include, SavingWithoutCallbacks