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Ubuntu 18.04 / 18.10 Ruby and Elixir Development Setup

Guide to setting up a new Ubuntu 18.04 dev environment with Ruby and Elixir installed with the asdf version management tool.

Update system and install prerequisite packages

Some of these packages may already be installed

sudo apt-get install make binutils gcc build-essential \
 git curl zlib1g-dev openssl libssl-dev libreadline-dev \

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#class KwargsInit(object):
  #def __init__(self, *args, **kwargs):
     ## Don't call super() here, it breaks things in python2.6
     #pass

#class Mixin1(KwargsInit):
  #def __init__(self, keyword1=None, **kwargs):
     #super(Mixin1, self).__init__(**kwargs)
     #self.keyword1 = keyword1

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from PyQt4 import QtCore, QtGui
import sys, time
 
class mythread(QtCore.QThread):
    
    total = QtCore.pyqtSignal(object)
    update = QtCore.pyqtSignal()
    
    def __init__(self, parent, n):
        super(mythread, self).__init__(parent)

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# https://gist.github.com/Riateche/5984815
import sip
sip.setapi('QString', 2)
sip.setapi('QVariant', 2)


from PyQt4 import QtCore, QtGui

class TableModel(QtCore.QAbstractTableModel):
    """

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from PyQt4.QtCore import QVariant
from qgis.core import QGis
from qgis.core import QgsVectorFileWriter, QgsVectorLayer, QgsFields, QgsField, QgsCoordinateReferenceSystem, QgsApplication
from qgis.core import QgsFeature, QgsGeometry, QgsPoint, QgsField
import tempfile
import os

QgsApplication.setPrefixPath("/usr", True)
QgsApplication.initQgis()

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import cProfile
import pandas as pd
import numpy as np
from scipy.spatial import cKDTree

def getRandomData(samples):
    points = np.random.rand(samples, 2) * 0.5
    data = pd.DataFrame(points, columns=['lat', 'lng'])
    # place points over Berlin
    data.lat += 13.1

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import numpy as np
import pandas as pd
import timeit
import geohash

samples = 1000
precision = 22
points = np.random.rand(samples, 2)
data = pd.DataFrame(points, columns=['lat', 'lng'])
data.lat += 13