89465127

import scala.io.Source

var filea = Source.fromFile("filea").mkString
var fileb = Source.fromFile("fileb").mkString

var merged = filea + fileb

print(merged)

89465127

<ul>
  <li>Install <a href="http://chocolatey.org/">Chocolatey</a></li>
  <li>Open powershell (as admin) and enter "cinst git.commandline"</li>
  <li>Environment variable: GIT_SSH = C:\git\bin\ssh.exe</li>
  <li>Put your keys into ~/.ssh</li>
</ul>

Optional steps:<br />
Add C:\git\bin to your PATH, if needed<br />
SSH stuff can be found in C:\git\bin

89465127

def get_random(collection, query={}):
    '''Gets a random record from a mongo collection'''
    random_num = random.random()
    query.update({'random' : {'$gte' : random_num}})
    result = collection.find_one(query)
    if not result:
        query.update({'random' : {'$lt' : random_num}})
        result = collection.find_one(query)
    return result

89465127

rsync -avz /path/to/local/sync/folder -e "ssh -i /path/to/ssh/key" ubuntu@ec2instance:/path/to/remote/sync/folder

89465127

# Download and unzip spark to your home directory

# You may want to run update if it's on a fresh OS
sudo apt-get update

# Install dependencies (& verify)
sudo apt-get install default-jdk scala git
java -version; javac -version; scala -version; git --version

# Configure - run these in your open terminal and add them to ~/.bashrc

89465127

from __future__ import print_function
import sys
import time

print('Executing...', end='')
sys.stdout.flush()
time.sleep(2)
print('Done.')

89465127

import multiprocessing
import StringIO

# function to be run on each line of file
def f(x):
    print x,

# Create mock file
mock_file = StringIO.StringIO()
for i in range(20):

89465127

import StringIO

# Create mock file
mock_file = StringIO.StringIO()
for i in range(20):
    mock_file.write("{}\n".format(i))
mock_file.seek(0)

# Do something
for line in mock_file:

89465127

other_var = 42
try:
    print 1/0
except Exception as e:
    print "\nError encountered. Other var = {}\n".format(other_var)
    raise e
    print 'You will not see this text'

89465127

import time

from progress.bar import Bar # sudo pip install progress

bar = Bar('Processing', max=20, suffix='%(index)d/%(max)d - %(percent).1f%% - %(eta)ds')
for i in range(20):
    time.sleep(.05) # Do some work
    bar.next()
bar.finish()