Why do you need colons for gesture recognizers

Apparently stuff that interacts with Objective C API's needs them..

http://stackoverflow.com/questions/24007650/selector-in-swift

https://developer.apple.com/library/ios/documentation/Swift/Conceptual/BuildingCocoaApps/InteractingWithObjective-CAPIs.html#//apple_ref/doc/uid/TP40014216-CH4-XID_26

What does the parenthesis in Swift does..

http://stackoverflow.com/questions/24071334/blocks-on-swift-animatewithdurationanimationscompletion

The completion parameter in animateWithDuration takes a block which takes one boolean parameter. In swift, like in Obj C blocks, you must specify the parameters that a closure takes:

UIView.animateWithDuration(0.2, animations: {
    self.blurBg.alpha = 1
}, completion: {
    (value: Bool) in
    self.blurBg.hidden = true
})

The important part here is the (value: Bool) in. That tells the compiler that this closure takes a Bool labeled 'value' and returns void.

For reference, if you wanted to write a closure that returned a bool the syntax would be

{(value: Bool) -> bool in
    //your stuff
}

pip lxml fails

Not sure when these errors started showing up for lxml, but pip install lxml started failing without disabling these CLANG options:

export CFLAGS=-Qunused-arguments
export CPPFLAGS=-Qunused-arguments

Internet Explorer 10's new compatibility view list

LinkedIn is listed as Emulate-IE9, which explains why anyone logging in via LinkedIn authentication has a User-Agent string that denotes IE9 even though they may have a later IE version.

https://community.mcafee.com/thread/58177?start=0&tstart=0

http://iecvlist.microsoft.com/IE10/1152921505002013023/iecompatviewlist.xml