similar to: Merging data frames on a variety of columns

I have a bunch of files named "[identifier1].[identifier2].[yyyymmdd].[hhmmss].txt" and im having trouble updating my read script for the timestamp. I've been using file.exists and a for loop but its highly inefficient and cumbersome. Would there be someway to create an object containing the string of each .txt file in some directory and to sort them by the date and time stamps so

People, For my little book library db I find the rails script generated stuff fine for most of my needs but there is one thing I couldn''t figure out . . Part of the auto output of app/view/books/edit.rhtml is: <%= start_form_tag :action => ''update'', :id => @book %> <%= render :partial => ''form'' %> <%= submit_tag

People, I have gone through the cookbook example: http://www.onlamp.com/pub/a/onlamp/2005/01/20/rails.html?page=1 and everything worked fine an a FC4/Postgres setup. I then tried to reproduce this success with something that would be useful to me - a library db using books & authors tables. The author list works but NOT the book list (unless I take line #17 out). I get this message:

babelmark sure does make it easy to convince people that markdown inconsistencies are a mess of trouble. before, people ignored the problem and/or its scope. and waylan's new list just shows how big that mess is. especially if we acknowledge all the other uses extant. plus gruber's latest manifestation of his longstanding reluctance to "fuck with it" means markdown is stuck.

Hello, I'm a bit new to the world of R so forgive my ignorance. I'm trying to do a zero-inflated negative binomial regression and have received an error message and i'm not sure what it means. I'm running R 2.5.1 on XP. I have just tried a really simple version of the model to see if it would run before I put all the variables in. I have attached all the variables to the

Hi! I'm trying to get quotas for shared mailboxes set up on my server. It's not working, and I fail to understand why. Documentation for setup of this complexity is rather scarce on the web, and the discussions I found either don't directly apply or terminate with "I got it working" but no explanation. Can someone please help? The setup is rather lengthy and complicated, so

Could someone recommend 5 different varieties of red wine, average price available in a supermarket for a novice to get a good overview of what's out there? :P

I have a weird problem with creating a new record when using PostgreSQL. From inside script/console ... >> entity = Entity.new >> entity.first_name = "Foo" >> entity.last_name = "bar" >> entity.save Throws an exception due to the following SQL error: duplicate key violates unique constraint. The application was working fine before and suddenly