Don Cruickshank questions

Don Cruickshank answers

• Full Listing of Installed Programs using Powershell
• Perform math operations with two equal length arrays
• SSI/mod_include: new ap_expr syntax not working as documented
• c-code reference to a struct
• In Vim, how to remove all lines that are duplicate somewhere
• Strange irb behaviour, listing content current directory
• Ruby: nested if statements
• Log use of the default route in rails
• How to terminate variable expansion to create a string in Powershell
• Adding extra run-time attribs to an activerecord object [duplicate]