solution-array-method-map.js

// ***************************************************************
// 1: Capitalize each element of the array - the whole word:
// ***************************************************************

const fruits = ['pineapple', 'orange', 'mango'];

const capsFruits = fruits.map(oneFruit => {
  return oneFruit.toUpperCase();
});

// we can write it in one line:
// const capsFruits = fruits.map(oneFruit => oneFruit.toUpperCase())
//
console.log(`fruits: ${fruits}`); // fruits: pineapple,orange,mango
console.log(`capsFruits: ${capsFruits}`); // capsFruits: PINEAPPLE,ORANGE,MANGO

// ***************************************************************
// 2: Capitalize the first letter of every city. <br>
// _Bonus_: if the city has 2 or more words in the name, capitalize the first letter of each word.
// ***************************************************************

const cities = [
  'miami',
  'barcelona',
  'madrid',
  'amsterdam',
  'berlin',
  'sao paulo',
  'lisbon',
  'mexico city',
  'paris'
];

const capsCities = cities.map(city => {
  if (city.includes(' ')) {
    
    let splittedArr = city.split(' ');
    
    const newArr = splittedArr.map(elem => elem.charAt(0).toUpperCase() + elem.slice(1));
    
    return newArr.join(' ');
  }
  return city[0].toUpperCase() + city.slice(1);
});

console.log(capsCities);
// [ 'Miami',
// 'Barcelona',
// 'Madrid',
// 'Amsterdam',
// 'Berlin',
// 'Sao Paulo',
// 'Lisbon',
// 'Mexico City',
// 'Paris' ]