heyolajyd

import React, { useEffect, useState, useCallback } from 'react';

const USERS_URL = 'https://example.com/api/users';

const PAGE_SIZE = 10;

const calcPageCount = (count) => {
    return Math.floor(count/PAGE_SIZE) + (count%PAGE_SIZE ? 1 : 0);
}

heyolajyd

/*
* Given an array of objects in JavaScript.
* Each one contains a name (a string) and ranking (a number). 
* Write two functions, one to return the objects ordered by ranking and another to return the average ranking. 
*/

// Calculate the average ranking
const calcAverageRanking = arr => arr.reduce((total, { ranking }) => (total + ranking), 0)/ arr.length;

// Function to return objects ordered by ranking

heyolajyd

import React, { PropTypes, Component } from 'react';
import { isEmpty } from 'underscore';
import { reduxForm } from 'redux-form';
import { bindActions, validateRegFields } from 'path to base';
import { regFields } from 'path to constants';
import TextInput from 'path to TextInput component';
import ProgressBar from 'path to ProgressBar component';

class RegisterForm extends Component {
  constructor(props) {

heyolajyd

Set up a simple folder strucure thus:

```
SumNumbers
|-src/
|  |-index.js
|-test/
| |-test.js
|-package.json
```

heyolajyd

Set up a simple folder strucure thus:

```
FlattenList
|-src
|  |-index.js
|-test
| |-test.js
|-package.json
```