public/subjects/using-map

Using Map

Instructions

Create the following functions:

Your solutions must use map.

Cities Only

citiesOnly: accepts an array of objects and returns an array of strings from the city key.

citiesOnly([
  {
    city: 'Los Angeles',
    temperature: '  101 °F   ',
  },
  {
    city: 'San Francisco',
    temperature: ' 84 ° F   ',
  },
]) // -> ['Los Angeles', 'San Francisco']

Upper Casing States

upperCasingStates: accepts an array of strings, and returns a new array of strings. The returned array will be the same as the argument, except the first letter of every word must be capitalized.

upperCasingStates(['alabama', 'new jersey']) // -> ['Alabama', 'New Jersey']

Fahrenheit to Celsius

fahrenheitToCelsius: accepts an array of fahrenheit temperatures as strings, and returns an array of strings converted to celsius. Round down the result.

fahrenheitToCelsius(['68°F', '59°F', '25°F']) // -> ['20°C', '15°C', '-4°C']

Trim Temp

trimTemp: accepts an array of objects, and returns a new array of objects with the same structure. The temperature strings must have their spaces removed in the new array.

trimTemp([
  { city: 'Los Angeles', temperature: '  101 °F   ' },
  { city: 'San Francisco', temperature: ' 84 ° F   ' },
]) /* -> [
  { city: 'Los Angeles', temperature: '101°F' },
  { city: 'San Francisco', temperature: '84°F' },
] */

Temp Forecasts

tempForecasts: accepts an array of objects, and returns an array of formatted strings. See the example below:

tempForecasts([
  {
    city: 'Pasadena',
    temperature: ' 101 °F',
    state: 'california',
    region: 'West',
  },
]) // -> ['38°Celsius in Pasadena, California']

Notions

• Array.prototype.map