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const read = async (filePath: string) => {
    return new Promise((resolve, reject) => {
        fs.readFile(filePath, 'utf8', (err: any, data: string) => {
            if (err) reject(err)
            resolve(data)
        })
    })
}

const write = (filePath: string, fileName: string, fileExtension: string, content: any) => {

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const useD3 = (renderChartFn: (el: any) => void, dependencies: any[]) => {
    const ref = useRef<HTMLElement>();

    useEffect(() => {
        if (!!ref.current) {
            renderChartFn(d3.select(ref.current));
        }

        return () => {};
    }, dependencies);

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// Source: https://twitter.com/calebporzio/status/1151876736931549185

<div class="flex">
    <aside class="h-screen sticky top-0">
        // Fixed Sidebar
    </aside>
    
    <main>
        // Content
    </main>

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import React, {
    useContext,
    createContext,
    ReactNode,
    useMemo,
    Children,
    isValidElement,
    useState
} from 'react';

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const encodeGetParams = p => 
  Object.entries(p).map(kv => kv.map(encodeURIComponent).join("=")).join("&");

const params = {
  user: "María Rodríguez",
  awesome: true,
  awesomeness: 64,
  "ZOMG+&=*(": "*^%*GMOZ"
};

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const formatter = new Intl.NumberFormat('en-US', {
    style: 'currency',
    currency: 'USD',
    minimumFractionDigits: 2,
});

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// HTML5 Pattern
// http://html5pattern.com/

const alphaNumeric = /[a-zA-Z0-9]+/;
const userNameWith20Chars = /^[a-zA-Z][a-zA-Z0-9-_\.]{1,20}$/;
const twitterHandle = /^[A-Za-z0-9_]{1,15}$/;

const password = /^(?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?!.*\s).*$/; // Uppercase, lowercase, and number
const password2 = /^(?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?!.*\s).*$/; // Password (UpperCase, LowerCase, Number/SpecialChar and min 8 Chars)

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// Building-blocks to use for composition
const double = x => x + x;
const triple = x => 3 * x;
const quadruple = x => 4 * x;

// Function composition enabling pipe functionality
const pipe = (...fns) => input => [...fns].reduce((acc, fn) => fn(acc), input);

// Composed functions for multiplication of specific values
const multiply6 = pipe(double, triple);

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const pause = (duration) => new Promise(res => setTimeout(res, duration));

const retry = (retries, fn) =>
    fn().catch(err => retries > 1 ? retry(retries - 1, fn) : Promise.reject(err));

const backoff = (retries, fn, delay = 500) =>
    fn().catch(err => retries > 1
        ? pause(delay).then(() => backoff(retries - 1, fn, delay * 2))
        : Promise.reject(err));

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function increment(input) { return input + 1;}
function decrement(input) { return input - 1; }
function double(input) { return input * 2; }
function halve(input) { return input / 2; }

var initial_value = 1;

var pipeline = [
  increment,
  increment,