ArrayExtenions

// From: http://stackoverflow.com/a/30724543/2526115
// Adds the ability to remove a certain object based on value from an array 

extension RangeReplaceableCollectionType where Generator.Element : Equatable {
  
  // Remove first collection element that is equal to the given `object`:
  mutating func removeObject(object : Generator.Element) {
    if let index = self.indexOf(object) {
      self.removeAtIndex(index)
    }
  }
}