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const _scrollTop = navigation => {
  if (navigation.isFocused() && navigation.state.index > 0) {
    // Pop to root on tab bar pressed if already focused on the tab
    navigation.popToTop();
  } else {
    // Scroll to top if at root of tab
    const navigationInRoute = navigation.getChildNavigation(
      navigation.state.routes[0].key
    );

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/**
* Good morning! Here's your coding interview problem for today.
* 
* This problem was recently asked by Google.
* 
* Given a list of numbers and a number k, return whether any two numbers from the list add up to k.
* 
* For example, given [10, 15, 3, 7] and k of 17, return true since 10 + 7 is 17.
* 
* Bonus: Can you do this in one pass?

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/**
* Good morning! Here's your coding interview problem for today.
* 
* This problem was asked by Uber.
* 
* Given an array of integers, return a new array such that each element at index i of the new array is the product of all the numbers in the original array except the one at i.
* 
* For example, if our input was [1, 2, 3, 4, 5], the expected output would be [120, 60, 40, 30, 24]. If our input was [3, 2, 1], the expected output would be [2, 3, 6].
*
* Follow-up: what if you can't use division?

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{
  "extends": ["airbnb", "prettier"],
  "plugins": ["prettier"],
  "rules": {
    "prettier/prettier": "error",
    "no-unused-vars": "warn",
    "no-console": "off",
    "func-names": "off",
    "no-process-exit": "off",
    "object-shorthand": "off",

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Pre-commit Hooks with Husky

• Prettier / ESLint
• TSLint
• Commit Lint

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To list any process listening to the port 8080:

lsof -i:8080

To kill any process listening to the port 8080:

kill $(lsof -t -i:8080)

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String.prototype.count = function(s1) { 
  return (this.length - this.replace(new RegExp(s1,"g"), '').length) / s1.length;
}

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Understanding Javascript Prototypes

In ES5

function Person(firstName, lastName) {
   this.firstName = firstName;
   this.lastName = lastName;
}
Person.isPerson = function(obj) {

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type Book = {
  title: string;
  genre: string;
  publicationYear: number;
};

type Car = {
  modelName: string;
  type: string;
  price: number;

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function hash(anyObject: any): string {
  if (Array.isArray(anyObject)) return anyObject.join('-');
  if (typeof anyObject === 'object') {
    return Object.entries(anyObject).map(e => e).join('-');
  }
  if (typeof anyObject === 'number' || typeof anyObject === 'boolean') {
    return anyObject.toString();
  }
  return anyObject;
}