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/**
 * Is `s` both 1) defined, 2) a string, and 3) not empty?
 * Can also be used as a TS type predicate to remove `undefined` values.
 */
export function isNonEmptyString(s?: string): s is string {
  return Boolean(
    typeof s === 'string' &&
    s.length > 0
  );

techieshark

/**
 * Return a Map of items to their indices in the array.
 *
 * The Map will have an entry for each item in A, with the item as the key and
 * an array of indices as the value.
 *
 * There will be as many items in the Map as there are unique items in `A`.
 *
 * @param A an array of items of any type `T`
 *

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techieshark

@keyframes prep {
    0% {
        transform: translate(-150%);
    }
    100% {
         transform: translate(-150%);
    }
}

@keyframes slide {

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{
  "name": "anything",
  "version": "0.1.0",
  "dependencies": {
    "@mapbox/mapbox-sdk": "^0.10.0",
    "@mapbox/polyline": "^1.1.0",
    "@material-ui/core": "^4.8.2",
    "@material-ui/icons": "^4.5.1",
    "@turf/circle": "^6.2.0-alpha.1",
    "@turf/distance": "^6.2.0-alpha.1",

techieshark

// __mocks__/stripe.ts: Jest Mock for Stripe class

/**
 * Fake a response from stripe.customers.list().
 * @example
 * mockStripeCustomerList(1) === { data: ['fake customer'], object: 'list', … }
 * @param count number of fake customers to return
 */
export const mockStripeCustomerList = (count: number) => ({
  data: (new Array(count)).fill('fake customer'),

techieshark

import { NO_CONTENT } from 'http-status-codes';

const send204 = (req: Request, res: Response, next: NextFunction) => {
  res.status(NO_CONTENT);
  res.end();
};

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import { NextFunction, Request, Response } from 'express';

/**
 * Sets Allow header.
 *
 * "The Allow header lists the set of methods support by a resource.
 * This header must be sent if the server responds with a 405 Method Not Allowed
 * status code to indicate which request methods can be used."
 *
 *

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/**
 * Returns whether the current browser supports
 * the `locales` argument of Number.prototype.toLocaleString().
 * IE < 11 does not.
 * Copied from https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/toLocaleString#Checking_for_support_for_locales_and_options_arguments
 * @return {boolean} true if browser supports it, otherwise false.
 * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/toLocaleString#Browser_compatibility
 */
function toLocaleStringSupportsLocales() {
  const number = 0;

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// @flow

// Flow-typed version of Object.values()
// @see: problem - https://github.com/facebook/flow/issues/2221
// @see: this solution - https://stackoverflow.com/a/51757027/1024811
export default function objectValues<A, B>(obj: {[key: A]: B}): Array<B> {
  return ((Object.values(obj): any): Array<B>);
}