grundmanise

const searchEpic = (action$, store) =>
  action$.ofType('SEARCH')
    .map(action => action.payload)
    .debounceTime(400)
    .switchMap(query => 
      ajax.post('http://localhost:8080/search', {query})
        .takeUntil(action$.ofType('CANCEL_SEARCH')))
    .map(res => ({type: 'SEARCH_DATA', result: res.response}))

grundmanise

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @providesModule shallowEqual
 * @typechecks
 * @flow
 */

grundmanise

const calculateDistance = (pointA, pointB) => {

  // http://www.movable-type.co.uk/scripts/latlong.html
  const lat1 = pointA.coordinate.latitude;
  const lon1 = pointA.coordinate.longitude;

  const lat2 = pointB.coordinate.latitude;
  const lon2 = pointB.coordinate.longitude;

  const R = 6371e3; // earth radius in meters

grundmanise

function getLinkedListLength(A = [1,4,-1,3,2]) {
	let count = 0;
	let current = 0;

	while(current !== -1) {
    if (A.length < current)
      throw Error(`No link found for value: ${current}. Count: ${count}`); 
    
		current = A[current];
		count++;

grundmanise

Personal note on how to setup launch images in RN when using RNN [iOS] (iPhone).

Preparation

Launch image sizes:

portrait

1. Retina HD 5.5" : 1242 x 2208 px
2. Retina HD 4.7" : 750 x 1334 px