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Data Structure Operations Complexity

Data Structure	Access	Search	Insertion	Deletion	Comments
Array	1	n	n	n
Stack	n	n	1	1
Queue	n	n	1	1
Linked List	n	n	1	n
Hash Table	-	n	n	n	In case of perfect hash function costs would be O(1)
Binary Search Tree	n	n	n	n	In case of balanced tree costs would be O(log(n))

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Add Git Branch Name to Terminal Prompt (Mac)

Open ~/.bash_profile in your favorite editor and add the following content to the bottom.

# Git branch in prompt.

parse_git_branch() {

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#  Customize BASH PS1 prompt to show current GIT repository and branch.
#  by Mike Stewart - http://MediaDoneRight.com

#  SETUP CONSTANTS
#  Bunch-o-predefined colors.  Makes reading code easier than escape sequences.
#  I don't remember where I found this.  o_O

# Reset
Color_Off="\[\033[0m\]"       # Text Reset

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const crypto = require('crypto');
const algorithm = 'aes-192-cbc';
const password = '3zTvzr3p67VC61jmV54rIYu1545x4TlY';
const key = crypto.scryptSync(password, 'salt', 24);
const iv = Buffer.alloc(16, 0);


function encrypt(text) {
  const cipher = crypto.createCipheriv(algorithm, key, iv)

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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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<?php
	// Installed the need packages with Composer by running:
	// $ composer require aws/aws-sdk-php
	
	$filePath = "https://example.com/test.png";

	require 'vendor/autoload.php';

	$bucketName = 'YOUR_BUCKET_NAME';
	$filePath = './YOUR_FILE_NAME.png';

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#!/bin/bash

rm -Rf /Applications/Android\ Studio.app  
rm -Rf ~/Library/Preferences/AndroidStudio*  
rm -Rf ~/Library/Preferences/com.google.android.*  
rm -Rf ~/Library/Preferences/com.android.*  
rm -Rf ~/Library/Application\ Support/AndroidStudio*  
rm -Rf ~/Library/Logs/AndroidStudio*  
rm -Rf ~/Library/Caches/AndroidStudio*  
rm -Rf ~/.AndroidStudio*  

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// GLOBAL
console.log(this); //--> window

// FUNCTION
function discoverThis() {
  console.log(this); //--> window
}
discoverThis();

// OBJECT

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using System;
using System.Collections.Generic;
using System.Text;

namespace CSharpWork
{
 
    public class MyLinkedList<T> where T: IComparable
    {
         class Node<G>

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import "regenerator-runtime/runtime";
import { useState } from "react";
import { useAsyncDebounce } from "react-table";

const ColumnFilter = ({ column }) => {
  const { filterValue, setFilter } = column;
  const [value, setValue] = useState(filterValue);
  const onChange = useAsyncDebounce((value) => {
    setFilter(value || undefined);
  }, 300);