perseverance questions

• How do you set all of your Sinatra responses to be JSON?
• Can you check if multiple values are the same on the same line in ruby on rails?
• Is it possible to assign an id to a Twitter Bootstrap popover?
• Best way to validate year via Ruby on Rails validates method?
• How do you create a callback with an if statement for multiple changed fields in Ruby on Rails?
• Why would you use redis over localStorage if you only needed less than 5MB of storage?
• Is there a way to check the performance of a command in the console in Ruby on Rails?
• How do you mock/stub backtick system calls in Rspec?
• Is it possible to set a custom analyzer to not tokenize in elasticsearch?
• How do you update an existing Bootstrap modal data-target?

perseverance answers