sachit-singh

#Steps to install latest Laravel, LEMP on AWS Ubuntu 14.4 version. This tutorial is the improvised verision of this tutorial on Digitalocean based on my experience.

Install PHP 7 on Ubuntu

Run the following commands in sequence.

sudo apt-get install -y language-pack-en-base
sudo LC_ALL=en_US.UTF-8 add-apt-repository ppa:ondrej/php
sudo apt-get update
sudo apt-get install zip unzip

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image: ruby:latest

before_script:
    - which ssh-agent || ( apt-get update -y && apt-get install openssh-client -y )
    - eval $(ssh-agent -s)
    - ssh-add <(echo -e "$SSH_PRIVATE_KEY")
    - gem install capistrano

stages:
    - deploy

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Neo4j Tutorial

Fundamentals

Store any kind of data using the following graph concepts:

• Node: Graph data records
• Relationship: Connect nodes (has direction and a type)
• Property: Stores data in key-value pair in nodes and relationships
• Label: Groups nodes and relationships (optional)

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Anaconda Commands

1. Managing Environments

Refer official docs [https://conda.io/docs/user-guide/tasks/manage-environments.html]

Help

conda create --help

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tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

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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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from django.db.models import F, Func, Value
from myapp.models import MyModel

# Annotation
MyModel.objects.filter(description__icontains='\r\n').annotate(
    fixed_description=Func(
        F('description'),
        Value('\r\n'), Value('\n'),
        function='replace',
    )

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Software Engineering Excellency

DATA STRUCTURES

• Doesn’t know the difference between Array and LinkedList
• Able to explain and use Arrays, LinkedLists, Dictionaries etc in practical programming tasks
• Knows space and time tradeoffs of the basic data structures, Arrays vs LinkedLists, Able to explain how hashtables can be implemented and can handle collisions, Priority queues and ways to implement them etc.
• Knowledge of advanced data structures like B-trees, binomial and fibonacci heaps, AVL/Red Black trees, Splay Trees, Skip Lists, tries etc

ALGORITHMS

• Unable to find the average of numbers in an array