JavaScript problems for an interview at a financial services company

interview-questions.js

/**
 * Question 1
 *
 * a) What will be logged to the console?
 * b) How could the params in the call to getData be changed in order to log something else?
 */
var getData = function(params) {
  if (typeof params.accountNumber !== 'number') {
    return Promise.reject({message: 'accountNumber must be of type: number'});
  } else {
    return Promise.resolve({foo: 'foo'});
  }
};

getData({accountNumber: '1234'})
.then(function(response) {
  console.log(response.foo);
})
.catch(function(error) {
  console.log(error.message);
});



/**
 * Question 2
 *
 * Create a function that receives an array of credit card data and then:
 *    a) filters out cards that end in 9
 *    b) sorts the cards first by roleTypeCode, then by cardNumber
 */
var cardsList = [
  {fullName: 'Star, Patrick', roleTypeCode: '03', cardNumber: '223456'},
  {fullName: 'Squarepants, Spongebob', roleTypeCode: '01', cardNumber: '987654'},
  {fullName: 'Tentacles, Squidward', roleTypeCode: '02', cardNumber: '765432'},
  {fullName: 'Tentacles, Squidward', roleTypeCode: '02', cardNumber: '465439'},
  {fullName: 'Star, Patrick', roleTypeCode: '03', cardNumber: '123456'}
];



/**
 * Question 3
 *
 * Create a function that receives a list of field configurations and a map of field id's and their values that
 * iterates through the list of fields and:
 *    a) sets a field's message property to 'Field is required' if the map of field values has a falsy value for the field's id
 *    b) removes the message property from a field if its value in the map of field values is truthy
 */
var fieldConfigs = [
  {
    id: 'date',
    label: 'Date',
    inputType: 'date',
    options: {
      minDaysFromToday: 0
    },
    message: 'Field successfully updated'
  },
  {
    id: 'lastName',
    label: 'First Name',
    inputType: 'text',
    maxLength: 40,
    required: true
  },
  {
    id: 'firstName',
    label: 'First Name',
    inputType: 'text',
    maxLength: 40,
    required: true
  }
];
var data = {
  date: '2020-01-01',
  lastName: 'Squarepants',
  firstName: ''
};