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# Resolve DNS
nslookup

# List of open internet connections established
# lsof is much more general purpose
lsof -i | grep -E "(LISTEN|ESTABLISHED)"

# Monitor network traffic & connections
nettop

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import UIKit

extension UIView {
    func findSuperviewWithClass<T>(superViewClass : T.Type) -> UIView? {
        var xsuperView : UIView!  = self.superview!
        var foundSuperView : UIView!
        
        while (xsuperView != nil && foundSuperView == nil) {
            if xsuperView.self is T {
                foundSuperView = xsuperView

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Getting Started with NPM (as a developer)

If you haven't already set your NPM author info, now you should:

npm set init.author.name "Your Name"
npm set init.author.email "[email protected]"
npm set init.author.url "http://yourblog.com"

npm adduser

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docker rmi $(docker images -q -f dangling=true)

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// LTS = v4.x, change accordingly 
curl -sL https://deb.nodesource.com/setup_4.x | sudo bash -

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# Give ownership of directory to user/group
sudo chown -R <user>:<group> directory
sudo chown -R :<group> directory
sudo chown -R <user>: directory

# Add user to group
sudo usermod -a -G groupName userName

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docker-machine create --driver amazonec2        \
  --amazonec2-instance-type t2.nano             \
  --amazonec2-region eu-west-1                  \
  node-name