John Hoffman questions

• How do I concisely return the first result in a Code Igniter query?
• What does it mean to flush file contents in Python?
• Why does my jQuery Mobile footer appear and then disappear when a user clicks the background?
• How can I detect when a global variable is set in javascript?
• Go to source code line in Chrome dev tools extension?
• Associating a paper-radio-button (wrapped by a div) with a paper-radio-group?
• Get reference to target of event in d3 in high-level listener?
• Why can't I inherit the prototype of the Animal class in my javascript code?
• What does "The type ArrayList is not generic" mean?
• How do I programmatically know when I’m about to exceed the javascript heap size? [duplicate]

John Hoffman answers