gnprice

# This is a snapshot of my ~/.gitconfig file, minus a few bits
# that are obsolete or non-reusable.
#
# For explanation of each setting, see `git help config`
# or https://git-scm.com/docs/git-config .
#
[user]
	name = Greg Price
	email = gnprice@gmail.com
[alias]

Kartones

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

• -E: will describe the underlaying queries of the \ commands (cool for learning!)
• -l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

hanbei

class KnnSimple {

  var trainData: List[Array[Double]] = null

  def train(trainData: List[Array[Double]]) {
    this.trainData = trainData
  }

  def nearestNeighbour(k: Int, point: Array[Double]) : List[Array[Double]] = {
    nearestNeighbour(k, point, (x, y) => Math.sqrt(x.zip(y).map(pair => (pair._1 - pair._2) * (pair._1 - pair._2)).sum))