1st

# Edit file and add there next function:
nano ~/.zshrc
# - OR -
nano ~/.profile

# Paste this function in the file:

function fix_virtualenv {
  #
  # Usage: fix_virtualenv project_name

1st

Linking directory in ReactJS project

I found that users of Create-React-App script have issues with building few projects that are based on the same "core" library. Let's imagine that you have a ui directory where you keep all UI React components. And you have two projects - blog and shop.

Now you wish to use the shared UI components in both these projects. But if you will create a symlink to a "raw" source code (where you use ES2015) - you will see that your code can't be imported, because it expects that they should be already compiled.

1st

# 0. install a Postgres

  # we use HomeBrew for this
  brew install postgres
  # init file structure for all databases
  initdb /usr/local/var/postgres

# 1. create new user for a database

  # 1.1. user without password

1st

#!/usr/bin/env python
# -*- coding: utf-8 -*-

class Singleton(type):
    def __call__(self, *args, **kwargs):
        if 'instance' not in self.__dict__:
            self.instance = super(Singleton, self).__call__(*args, **kwargs)
        return self.instance

1st

#!/usr/bin/env python
# -*- coding: utf-8 -*-

#
# Test that I passed on codility.com for TopTal company
#


# Task #1
def binary_gap(N):

1st

#!/usr/bin/env python
# -*- coding: utf-8 -*-

def get_prime_number(index):
    '''
    Return prime number by given index.

    By listing the first six prime numbers: 2, 3, 5, 7, 11, and 13, we can see that the 6th prime is 13.

    Args: