In this example,

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NSInteger val = 15000;
    NSLog(@"%i", val);

XCode will flag this error

Values of type "NSInteger" should not be used as format arguments: add an explicit cast to 'long' instead.

It is because NSInteger can be 32-bit or 64-bit, depending on the platform, the compiler recommends to add a cast to long generally.

Here is the code in question:

class Something: NSCoding {
    ...

let smth = Something() 
let data = NSKeyedArchiver.archivedDataWithRootObject(smth);

It throws this exception:

2014-09-12 16:30:00.463 MyApp[30078:60b] *** NSForwarding: warning: object 0x7a04ac70 of class '_TtC8MyApp7Something' does not implement methodSignatureForSelector: -- trouble ahead
Unrecognized selector -[MyApp.Something replacementObjectForKeyedArchiver:]

It is because Something does not inherit from NSObject

Hoisting is when JavaScript moves the definition of some code to the top of the closure.

Source

Valid values of attribute overflow are visible, hidden, scroll, auto, initial and inherit

It controls browser behavior if content overflows an element’s box.

First you need to install npm via brew

Then run npm install -g bower as documented in bower websiter