louicoder

// check version
node -v || node --version

// list locally installed versions of node
nvm ls

// list remove available versions of node
nvm ls-remote

// install specific version of node

louicoder

function formatDateDifference(isoDateString) {
  const inputDate = new Date(isoDateString);
  const currentDate = new Date();

  const timeDifference = currentDate - inputDate;

  // Calculate the number of years
  const years = Math.floor(timeDifference / (365.25 * 24 * 60 * 60 * 1000));

  // Calculate the number of months

louicoder

// ==============================================
// Function validates whether passed string is valid iso format
function isIsoDate(str) {
  if (!/\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}.\d{3}Z/.test(str)) return false;
  const d = new Date(str); 
  return d instanceof Date && !isNaN(d) && d.toISOString()===str; // valid date 
}

console.log(isIsoDate('2011-10-05T14:48:00.000Z'))

louicoder

// ================================================
<< Error >>
APNS device token not set before retrieving FCM Token for Sender ID 

<< Fix >>
Add a firebase.json file at the root and add the following
{
  "react-native": {
    "analytics_auto_collection_enabled": false,
    "messaging_ios_auto_register_for_remote_messages": false

louicoder

{
  "compilerOptions": {
    "baseUrl": ".",
    "paths": {
      "src/*": [
        "./src/*"
      ]
    }
  },
  "include": [

louicoder

// useful to debug js code errors
adb logcat "*:S" ReactNative:V ReactNativeJS:V

// useful to debug native errors (when the app won't even start)
adb logcat "*:E"

louicoder

export const generateString = (length = 10) => {
  const characters =
    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
  let result = "";
  // const charactersLength = characters.length;
  for (let i = 0; i < length; i++) {
    result += characters.charAt(Math.floor(Math.random() * characters.length));
  }

  return result;

louicoder

const grouped = array.reduce((obj, item) => {
    const key = item.age;

    if (!obj[key]) {
        obj[key] = [];
    }

    obj[key].push(item);

    return obj;

louicoder

// Get screen dimensions
const { WIDTH, HEIGHT } = Dimensions.get();

// style={{ aspectRatio: image.width / image.height }}

const getImageStyles = (imageWidth, imageHeight) => {
  // WIDTH - Screen Width.
  // HEIGHT - Screen Height.
  return { width: WIDTH, height: imageHeight / imageWidth * WIDTH };
};

louicoder

// HOC component
import {Header, Footer} from '/path/to/Components';

export default ({header , footer, component: Component}) => {
  return (
  <div>
     {header ? <Header /> : null} // check for true or false prop for rendering header
     <Component /> // render component passed.
     {footer ? <Footer /> : null} // check for true or false prop for rendering footer
  </div>