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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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// generate a unique 6-digit OTP code
const generateOntTimeCode = () => Math.floor(Math.random() * 900000) + 100000;

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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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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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# 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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# To add in your ~/.zshrc or ~/.bashrc file
export VOLTA_HOME="$HOME/.volta"
export PATH="$VOLTA_HOME/bin:$PATH"

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How to install Ruby & Rails on macOS?

Here are the simple 4 steps to install Ruby 3 and Rails v7 on macOS

Step 1: Install Homebrew

First, open your Terminal and run the following steps (I personally use iTerm2).

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

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 echo "\n# Allow unmatched wildcard expressions in zsh\nsetopt NO_NOMATCH" >> ~/.zshrc

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library VS require in R

When loading a library, always use library. Never use require

TL;DR: require breaks one of the fundamental rules of robust software systems, fail early. In a nutshell, this is because, when using require, your code might yield different, erroneous results, without signalling an error. This is rare but not hypothetical! Consider this code, which yields different results depending on whether {dplyr} can be loaded:

On the other hand, require does install the package if hasn’t been installed (whereas library doesn’t).

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git tag --sort=-creatordate | head -n3