Red Squirrel Stumblog

Palm Pre max image height in pixels

For you future Palm Pre developer googlers: the max height is 425. Don’t trust the emulator!!!!

copyplist failed ... exit code 71

I got this error when trying to compile an iPhone project in XCode. I found the answer to my problem on StackOverflow, but I couldn’t upvote or thank Jimmy for his solution, which is related to a Ruby install. Thanks Jimmy!

If before_update is being called on create...

It’s because you have an update in your after_create.

class User < ActiveRecord::Base
  before_update :audit_info
  after_create :generate_key

private

  def generate_key
    update_attribute(:key, generate_stuff)
  end

  def audit_info
    AuditLog.big_change!(self)
  end
end

If you want Ruby's strftime to give you single digit hours

Then the undocumented %l (yes, a lower-case L) is your friend.

Time.now.strftime("%I:%M%p")
# generates 05:00pm
Time.now.strftime("%l:%M%p")
# generates 5:00pm

Rails transactions don't rollback in tests

Here’s a discussion, and here’s the simplest solution:

# in your TestCase
self.use_transactional_fixtures = false

Porting Ruby number_with_delimiter to Perl

Ruby:

def number_with_delimiter(number)
  parts = number.to_s.split('.')
  parts[0].gsub!(/(\d)(?=(\d\d\d)+(?!\d))/, "\\1,")
  parts.join '.'
end

sub number_with_delimiter {
    my $number = shift;
    my @parts = split(/\./, $number);
    $parts[0] =~ s/(\d)(?=(\d\d\d)+(?!\d))/$1,/g;
    return join(".", @parts);
}

I want a US phone number that I can SMS, which will push that message to a URL

Tweet me with ideas

Dreamhost Subversion stops working after enabling Passenger

The solution to this is to just setup a subdomain for your Subversion repository.

A quick way to find slow Rails actions

tail -10000 log/production.log | egrep "Completed in [0-9]{2,}"

Grouping by Object#hash

I liked this little idiom from Tobias.

servers = [ 'memcache1', 'memcache2', 'memcache3' ]
servers[ 'product-1' % servers.size ]