tshev

# download http://api.rubyonrails.org
wget -r -k -p http://api.rubyonrails.org

# find in directory by pattern
grep  --include={*.c,*.h}   -r 'directory' -e "pattern"
grep  --exclude={*.c,*.h}   -r 'directory' -e "pattern"

# find files bigger then 32M
find . -type f +32M

tshev

#!/usr/bin/python
import numpy
def transformOzVector(alpha, vector):
  m = numpy.matrix([[numpy.math.cos(alpha), -numpy.math.sin(alpha), 0],
                   [numpy.math.sin(alpha), numpy.math.cos(alpha), 0],
                   [0, 0, 1]])
  return m*vector
result = transformOzVector(numpy.math.pi*1, numpy.matrix([1,0,0]).T)
print result

tshev

#!/usr/bin/bash
file=`uuidgen`
cat "file" | while read v
do
	read x;
	if [ $x ]
	then
		echo $x >> $file
	fi
	echo $v >> $file

tshev

#!/usr/bin/python
import scipy
import scipy.linalg
def f(a):
  s = 0
  for i in range(len(a)):
    s+= a[i]*x**i
  return s
def check(roots):
  for x in roots:

tshev

import numpy as np
xPoly = [1, 2, 1]
yPoly = [-1, 1]
np.polydiv(xPoly, yPoly)

tshev

import numpy as np
# P(x) = 3x^2 + 6x + 1 
np.polyval([9, 6, 1], 0) # returns 1

tshev

%pylab inline
import matplotlib.pyplot as plt
import scipy
import scipy.stats
g = scipy.stats.norm(-3.5,0.05)
r = g.rvs(100)
r.sort()
print g.median()
plt.plot(r, np.array([g.pdf(i) for i in r]))
plt.show()

tshev

%pylab inline
import matplotlib.pylab as plt
import re
class Vs:
    def __init__(self,fname):
        self.fname = fname
        self.readDate()
        self.count = 0
        self.time = []
    def readDate(self):

tshev

#!/bin/bash
echo "Enter your path to the repository without name"
read path
cd $path

echo "Enter the reponame"
read reponame
mkdir "$reponame"".git" && cd "$reponame"".git"
git init --bare
cd hooks

tshev

#include <iostream>
#include <vector>
#include <string>
int main() {
  std::string str1 = "AA";
  std::vector< std::string > v;
  v.push_back(str1);
  std::cout << str1 << "\n"; // AA
  v.push_back(std::move(str1));
  std::cout << str1 << "\n"; // AA