agoodman

NSArray* set1 = [NSArray arrayWithObjects:@"one",@"two",@"three",nil];
NSArray* set2 = [NSArray arrayWithObjects:@"two",@"three",@"four",nil];

NSMutableArray* set3 = [NSMutableArray arrayWithCapacity:MIN(set1.count,set2.count)];

for (NSString* element in set1) {
  if( [set2 containsObject:element] ) {
    [set3 addObject:element];
  }
}

agoodman

/* say you have a process driven by the main thread, such as
 * a UI control, and you want the process to execute on a
 * background thread, but once it's done, you want to update
 * some UI element. that must happen on the main thread, so
 * here's an example of how you might do that
 */

- (IBAction)buttonClicked
{
  dispatch_async(backgroundProcessingQueue, ^{

agoodman

// if you don't know why this doesn't compile, find another job
int tBrains = 9;
if( tBrains<10 ) {
  int tZombies = 1;
}
tZombies += tBrains;

agoodman

CSV.open("users.csv","wb") {|csv| User.all.each {|user| csv << [user.email, "#{user.first_name} #{user.last_name}"]}}

agoodman

// GCD
#define async_main(aBlock) dispatch_async(dispatch_get_main_queue(), aBlock)
#define async_global(aBlock) dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), aBlock)

// UIKit
#define Alert(aTitle,aMessage) [[[[UIAlertView alloc] initWithTitle:aTitle message:aMessage delegate:nil cancelButtonTitle:nil otherButtonTitles:@"OK",nil] autorelease] show]
#define NetworkAlert Alert(@"Network error",@"Please check your network connection.")

agoodman

# Model:
#
# class Example < ActiveRecord::Base
# end
#
# Controller:
#
# class ExamplesController < ActionController::Base
#   def index
#     @examples = Example.filtered_scope(params[:filter])

agoodman

# this is really useful for collecting record counts into discrete buckets for visualization
(1..6).collect {|n| Query.where(['created_at > ?',Date.today-n.months]).where(['created_at < ?',Date.today-(n-1).months]).count}

agoodman

  <picker>
    <code>00000001</code>
    <created-at type="datetime">2012-02-24T19:57:17Z</created-at>
    <dob type="date" nil="true"></dob>
    <first-name>andy</first-name>
    <id type="integer">12</id>
    <last-name>smith</last-name>
    <mail-address nil="true"></mail-address>
    <mail-city nil="true"></mail-city>
    <mail-state nil="true"></mail-state>

agoodman

possible_words = ["seek", "find", "ignore", "pursue", "covet"]
available_letters = ["a", "c", "e", "f", "g", "i", "n", "o", "p", "r", "t", "u", "v"]

words = Array[possible_words].flatten
available_letters.each {|e| words = words.map {|w| w.sub(e, '')}}

viable_words = words.each_with_index.collect {|w,k| possible_words[k] if w==""}.compact

agoodman

class BadSslController < ApplicationController

  before_filter :enforce_https
  
  def enforce_https
    if use_ssl?
      if request.protocol != 'https://'
        redirect_to url_for(controller: controller_name, action: action_name, protocol: 'https') and return
      end
    else