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‎.babelrc‎

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{
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"presets": ["env"],
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"plugins": ["transform-async-to-generator", "transform-object-rest-spread", "transform-class-properties"],
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}

‎.eslintignore‎

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code/functions/arrow/close.js

‎.eslintrc‎

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{
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"env": {
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"browser": true
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},
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"parser": "babel-eslint",
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"extends": "airbnb",
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"globals": {
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"document": true,
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"afterEach": true,
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"beforeEach": true,
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"jest": true,
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"it": true,
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"describe": true,
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"expect": true,
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"fetch": true,
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"google": true
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},
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"rules": {
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"class-methods-use-this": 0,
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"no-restricted-syntax": 0,
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"import/prefer-default-export": 0,
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"no-underscore-dangle": 0,
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"no-unused-expressions": 0,
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"no-plusplus": 0,
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"no-shadow": 0,
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"arrow-parens": ["error", "as-needed"],
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"arrow-body-style": 0,
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"linebreak-style": "off"
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}
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}

‎.gitignore‎

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node_modules/

‎code/arrays/arrays/arrays.js‎

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/* eslint-disable no-restricted-syntax */
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// # START:sort
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const team = [
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'Joe',
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'Dyan',
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'Bea',
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'Theo',
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];
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function alphabetizeTeam(team) {
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return [...team].sort();
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// ['Bea', 'Dyan', 'Joe', 'Theo']
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}
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// # END:sort
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function getTotalStats() {
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// # START:loop
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const game1 = {
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player: 'Jim Jonas',
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hits: 2,
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runs: 1,
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errors: 0,
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};
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const game2 = {
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player: 'Jim Jonas',
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hits: 3,
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runs: 0,
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errors: 1,
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};
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const total = {};
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const stats = Object.keys(game1);
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for (let i = 0; i < stats.length; i++) {
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const stat = stats[i];
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if (stat !== 'player') {
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total[stat] = game1[stat] + game2[stat];
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}
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}
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// {
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// hits: 5,
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// runs: 1,
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// errors: 1
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// }
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// # END:loop
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return total;
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}
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// # START:filter
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const staff = [
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{
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name: 'Wesley',
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position: 'musician',
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},
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{
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name: 'Davis',
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position: 'engineer',
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},
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];
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function getMusicians(staff) {
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return staff.filter(member => member.position === 'musician');
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// [{name: 'Wesley', position: 'musician'}]
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}
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// # END:filter
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// # START:object
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const dog = {
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name: 'Don',
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color: 'black',
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};
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dog.name;
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// Don
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// # END:object
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// # START:pair
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const dogPair = [
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['name', 'Don'],
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['color', 'black'],
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];
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function getName(dog) {
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return dog.find(attribute => {
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return attribute[0] === 'name';
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})[1];
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}
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// # END:pair
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export {
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alphabetizeTeam,
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dogPair,
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getMusicians,
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getName,
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getTotalStats,
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staff,
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team,
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};

‎code/arrays/arrays/arrays.spec.js‎

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import expect from 'expect';
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import {
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alphabetizeTeam,
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dogPair,
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getMusicians,
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getName,
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getTotalStats,
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staff,
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team,
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} from './arrays';
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describe('array actions', () => {
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it('should alphabetize team', () => {
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expect(alphabetizeTeam(team)).toEqual([
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'Bea',
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'Dyan',
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'Joe',
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'Theo',
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]);
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});
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it('should get musicians', () => {
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expect(getMusicians(staff)).toEqual([
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{
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name: 'Wesley',
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position: 'musician',
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},
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]);
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});
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it('should get name', () => {
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expect(getName(dogPair)).toEqual('Don');
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});
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it('should calculate stats', () => {
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expect(getTotalStats()).toEqual({
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hits: 5,
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runs: 1,
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errors: 1,
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});
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});
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});

‎code/arrays/includes/greater.js‎

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/* eslint-disable no-unused-vars */
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// # START:index
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const sections = ['contact', 'shipping'];
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function displayShipping(sections) {
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return sections.indexOf('shipping') > -1;
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}
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// true
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// # END:index
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export { displayShipping };

‎code/arrays/includes/includes.js‎

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/* eslint-disable no-unused-vars */
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// # START:includes
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const sections = ['contact', 'shipping'];
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function displayShipping(sections) {
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return sections.includes('shipping');
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}
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// # END:includes
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export { displayShipping };

‎code/arrays/includes/includes.spec.js‎

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import expect from 'expect';
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import {
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displayShipping,
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} from './includes';
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import {
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displayShipping as displayShippingIndex,
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} from './greater';
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describe('includes actions', () => {
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it('should display shipping using index', () => {
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const sections = ['shipping', 'address'];
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expect(displayShippingIndex(sections)).toEqual(true);
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});
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it('should not display shipping using index', () => {
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const sections = ['contact', 'address'];
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expect(displayShippingIndex(sections)).toEqual(false);
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});
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it('should display shipping', () => {
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const sections = ['shipping', 'address'];
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expect(displayShipping(sections)).toEqual(true);
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});
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it('should not display shipping', () => {
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const sections = ['contact', 'address'];
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expect(displayShipping(sections)).toEqual(false);
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});
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});

‎code/arrays/includes/problem.js‎

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/* eslint-disable no-unused-vars */
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// # START:noIndex
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const sections = ['shipping'];
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function displayShipping(sections) {
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if (sections.indexOf('shipping')) {
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return true;
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}
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return false;
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}
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// false
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// # END:noIndex
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export { displayShipping };

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