Chris J questions

Chris J answers

• Is there a simple way to setup a local, self-contained web server for perl testing?
• Algorithm to find a number which occurs only once in an array, given all the other numbers occur twice [duplicate]
• how to write only one pattern to exchange two strings in two-ways in vim
• How to print the line that matches my text using find in linux?
• MySQL: Getting a row number (ranking) for a specific row