sai10

What is Regular Expression?

Regular expression is a group of characters or symbols which is used to find a specific pattern from a text.

A regular expression is a pattern that is matched against a subject string from left to right. The word "Regular expression" is a

sai10

1×× Informational

An informational response indicates that the request was received and understood. It is issued on a provisional basis while request processing continues. It alerts the client to wait for a final response.

100 Continue
101 Switching Protocols
102 Processing

2×× Success

This class of status codes indicates the action requested by the client was received, understood, accepted, and processed successfully.

200 OK

sai10

1-Pl-SQL Quick Reference

2-Pl-SQL NOTES

3-Pl-SQL Frameworks

1-PL/SQL Quick Reference

• SELECT Statement

  SELECT [DISNCT] {*, column [alias],...} FROM table [WHERE condition(s)] [ORDER BY {column, exp, alias} [ASC|DESC]]

sai10

Table Of Contents

• Data Structures
  • Linked Lists
  • Trees
    • Binary Trees
    • Binary Search Tree
    • Red-Black Tree
    • AVL Tree
• Tries

sai10

Username Regular Expression Pattern

^[a-z0-9_-]{3,15}$

EXPLANATION

    ^                    # Start of the line
  [a-z0-9_-]	     # Match characters and symbols in the list, a-z, 0-9 , underscore , hyphen
             {3,15}  # Length at least 3 characters and maximum length of 15
$                    # End of the line

sai10

1. 12 FACTOR APP - For any developer
2. How to Learn Machine Learning, The Self-Starter Way in 90 Days?
3. bogotobog - programming tutorials
4. FavoriteBlog - ML, AI n DL blog
5. learnopenCV - Blog
6. How To Write Unmaintainable Code - Ensure a job for life ;-)

sai10

Studying for a Tech Interview Sucks, so Here's a Cheat Sheet to Help

This list is meant to be a both a quick guide and reference for further research into these topics. It's basically a summary of that comp sci course you never took or forgot about, so there's no way it can cover everything in depth. It also will be available as a gist on Github for everyone to edit and add to.

Data Structure Basics

###Array ####Definition:

• Stores data elements based on an sequential, most commonly 0 based, index.
• Based on tuples from set theory.

sai10

echo "xxx" >> README.md     [or]    touch README.md  
git init
git add . --all
git commit -m "Initial commit"
git remote add origin <git-web-url>
git push -u origin master

if error: failed to push some refs to <git link> then:
  git pull --rebase origin master
  git push -u origin master

sai10

import IPython.nbformat.current as nbf
nb = nbf.read(open('test.py', 'r'), 'py')
nbf.write(nb, open('test.ipynb', 'w'), 'ipynb')

sai10

import pickle

a = [1,2]
b = [3,4]

with open("tmp.pickle", "wb") as f:
    pickle.dump((a,b), f)

with open("tmp.pickle", "rb") as f:
    a,b = pickle.load(f)