Zach Langley questions

Zach Langley answers

• Printing Java Collections Nicely (toString Doesn't Return Pretty Output)
• What is a CGVector?
• Comparing & sorting array of hashes in Ruby
• Rails controller does not accept JSON?
• Finding the difference between strings in Ruby
• Iterate over Ruby Time object with delta
• HashMap group by (Java)
• Simple string parsing in Cocoa / Objective-C: parsing a command line into command and arguments