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# create a data frame
user_df <- data.frame(
    name = c("Alice", "Bob", "Charlie", "Dave"),
    age = c(25, 32, 47, 19),
    city = c("New York", "San Francisco", "Los Angeles", "Chicago"),
    stringsAsFactors = FALSE
)

# view the data frame
user_df

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How to quickly setup a LAMP on MacOS

Install PHP 7.3 and MySQL 5.1+

First, let’s install the Mac dependency manager “Homebrew”

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

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Setup your SSH key

How to setup SSH key for the first time on your Mac OS

To setup your SSH key on your computer

1. Type ssh-keygen -t ed25519 -C "<YOUR_NAME>@zambrero.com"
2. Create a SSH config file to automatically load keys into the ssh-agent and store passphrases in your keychain
   touch ~/.ssh/config
3. Open the config file with your default text editor

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import {useEffect, useState} from 'react'
import './App.css'

export const CounterApp = () => {

    const storageKeyName = "count";

    const retrieveCountValue = () => Number(localStorage.getItem(storageKeyName) || 0);

    const [count, setCount] = useState(retrieveCountValue());

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<?php
$sDayPrefix = date('D');

$sMessage = match ($sDayPrefix) {
    'Mon' => 'Hello Monday! Have a great week!',
    'Tue' => 'Hello Tuesday! Have a great day!',
    'Wed' => 'Happy hump day all!',
    'Thu' => 'Almost the end of the working week!',
    'Fri' => 'Yaay! Happy Friday!',
    'Sat' => 'Enjoy your weekend! Have a great Saturday :)',

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If you name your PostgreSQL table names or column names with caps like lowerCamel / UpperCamel cases, you will need to surround the column names/table name with double quotes to preserve the case of their names since our the columns in our database are lowerCamel case. Otherwise, Postgres wouldn’t find them as it would look for lowercase-only names.

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Caps, programming

• UpperCamel case for classes. e.g., MyClass {}
• lowerCamel case for variable names. e.g., myVar = "";
• snake_case for Python functions and other functions delimited with underscores _ e.g., my_function();

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My Alfred productivity workflows

• Raindrop Search - https://github.com/westerlind/alfred-raindrop-search
• GitHub Search (very clean source code too!) - https://github.com/pawelgrzybek/alfred-github-search
• Google Drive - https://github.com/alfredapp/google-drive-workflow
• CoffeeCoffee, to prevent laptop to go into sleep mode - https://github.com/vitorgalvao/alfred-workflows/tree/master/CoffeeCoffee
• Search in the native Apple Notes app - https://github.com/sballin/alfred-search-notes-app
• Windows manager, resize computer's opened windows - https://github.com/pawelgrzybek/div
• Parse and stringify JSON - https://github.com/pawelgrzybek/alfred-json
• Password generator (generate random passwords of any length) - https://github.com/otherguy/alfred-passwords-workflow

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export default [
  {
    name: 'Alabama',
    abbreviation: 'AL',
  },
  {
    name: 'Alaska',
    abbreviation: 'AK',
  },
  {

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<?php

class InvalidDayMomentException extends InvalidArgumentException
{

}