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Installing Node.js with nvm to Linux & macOS & WSL

A quick guide on how to setup Node.js development environment.

Install nvm for managing Node.js versions

nvm allows installing several versions of Node.js to the same system. Sometimes applications require a certain versions of Node.js to work. Having the flexibility of using specific versions can help.

1. Open new Terminal window.

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def TRUE(x):
    return lambda y: x


def FALSE(x):
    return lambda y: y


def NOT(x):
    return x(FALSE)(TRUE)

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Common Options

-#, --progress-bar Make curl display a simple progress bar instead of the more informational standard meter.

-b, --cookie <name=data> Supply cookie with request. If no =, then specifies the cookie file to use (see -c).

-c, --cookie-jar <file name> File to save response cookies to.

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Processing JSON using jq

jq is useful to slice, filter, map and transform structured json data.

Installing jq

On Mac OS

brew install jq

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'use strict';

function getNextPositions(start) {
  var moves = [
    { x: -2, y: -1 },
    { x: -2, y: +1 },    
    { x: -1, y: -2 },    
    { x: -1, y: +2 },    
    { x: +1, y: -2 },    
    { x: +1, y: +2 },    

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System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

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import unittest
import os
 
from zipfile import ZipFile
from mock import MagicMock, patch, Mock, mock_open

# The functions that are tested:
def function_to_test_zipfile(example_arg):
    with ZipFile(example_arg, 'r') as zip_in:
        for input_file in zip_in.infolist():

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// Reference: http://www.blackdogfoundry.com/blog/moving-repository-from-bitbucket-to-github/
// See also: http://www.paulund.co.uk/change-url-of-git-repository

$ cd $HOME/Code/repo-directory
$ git remote rename origin bitbucket
$ git remote add origin https://github.com/mandiwise/awesome-new-repo.git
$ git push origin master

$ git remote rm bitbucket

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1. Move to your /var/www directory
cd /var/www

2. Install laravel
laravel new myapp

OR 

composer create-project --prefer-dist laravel/laravel myapp