Generate a Gravatar URL with Ruby
To get a Gravatar you need to hash an email address with the MD5 algorithm.
MD5 is a part of the Ruby standard library. Rails loads it by default, but otherwise you will have to require it yourself.
This is a simple implementation.
Gravatar su...
Written by Sean Behan on 04/11/2014
Link to jQuery Source from Google's CDN
https://ajax.googleapis.com/ajax/libs/jquery/1.6.1/jquery.min.js
That is the link to the jQuery source hosted by Google on their CDN. It's probably already cached on client machines so it should be as fast as is possible! You can read more/use other Java...
Written by Sean Behan on 06/17/2012
Rails Send_File in Production Delivers an Empty File
If you're running Rails in production it will by default be configured to let apache or nginx send files for you. If you're handling file downloads yourself with send_file
send_file("path/to/file.txt")
you will notice that the downloaded files are empty...
Written by Sean Behan on 06/17/2012
Listing Files and Directories with PHP
Listing all files and directories using PHP 5.
<?php
$files = array(); $dir = dir(".");
while(false!==($file=$dir->read())):
if(($file{0}!=".") && ($file{0}!="~") && (substr($file, -3)!="LCK")
&& ($file!=basename($_SERVER["PHP_SELF"]))):
...
Written by Sean Behan on 06/17/2012
Select Basename in Postgres SQL
Postgres doesn't have a basename function per se. But it's easy to accomplish.
select regexp_replace('http://www.seanbehan.com/images/logo.png', '.+/', '') ;
-- Will return logo.png
Written by Sean Behan on 08/16/2018
