ericnograles

We have some expressions, represented as a list where every term is either:

• A variable (e.g. A, B, C)
• A boolean operator (AND or OR)
• A nested expression (list)

You're presented an expression with infix operators, like:

[A AND [B OR C]]

Can you transform these expressions so the operators are in prefix order? The output for this case is:

ericnograles

const path = require('path');
const fs = require('fs');
const topLevelQuery = fs.readFileSync(
  path.resolve(__dirname, 'Query.graphql'),
  { encoding: 'UTF-8' }
);

let types = fs
  .readdirSync(__dirname)
  .filter(fileName => {

ericnograles

'use strict';

import React from 'react';

import {
  StyleSheet,
  View,
  TouchableOpacity,
} from 'react-native';

ericnograles

import React from 'react';
import { View, PanResponder, StyleSheet } from 'react-native';

import Svg, { G, Surface, Path } from 'react-native-svg';

export default class SignatureView extends React.Component {
  constructor(props, context) {
    super(props, context);
    this.state = {
      currentMax: 1,

ericnograles

#!/usr/bin/env bash

# The command below will fire an empty iOS simulator. You will initially get an error.
# To actually launch it, click on Hardware -> Device -> iOS [some version] -> [device]
cd /Applications/Xcode.app/Contents/Developer/Applications
open -n Simulator.app

ericnograles

import React from 'react';
import { View, Text, ActivityIndicator, TouchableOpacity } from 'react-native';

export default class ButtonWithActivityIndicator extends React.Component {
  render() {
    const { buttonStyle, textStyle, label, onPress, activityIndicatorSize, activityIndicatorColor, loading } = this.props;
    return (
      <TouchableOpacity style={buttonStyle} onPress={() => {
        if (!loading) {
          return onPress();

ericnograles

import React from 'react';
import { View, ActivityIndicator, Dimensions } from 'react-native'
import * as Animatable from 'react-native-animatable'; // TODO: Please install react-native-animatable as a dependency

const window = Dimensions.get('window');

export default class LoadingView extends React.Component {
  componentWillUpdate(nextProps) {
    const { loading } = this.props;
    if (this.refs.view && loading !== nextProps.loading) {