Return specific object value as a string in a function-CodePudding

I'm trying to return an specific value as a string, but I end up getting the value in an array. Instead of getting 'unknown', I get ['u', 'n', 'k', 'n', 'o', 'w', 'n']

Challenge: Create a function findWaldo that accepts an object and returns the value associated with the key 'Waldo'. If the key 'Waldo' is not found, the function should return 'Where's Waldo?'

My code:

function findWaldo(obj) {

  let values = Object.keys(obj);

  if (values.includes('Waldo')) {
    return Object.values(obj.Waldo);
  } else {
    return 'Where\'s Waldo?';
  }
};


// Uncomment these to check your work!
const DC = {
  'Bruce': 'Wayne',
  'Harley': 'Quinn'
}
const supernatural = {
  'Sam': 'Winchester',
  'Dean': 'Winchester',
  'Waldo': 'unknown'
}

console.log(findWaldo(DC)) // should log: 'Where's Waldo?'
console.log(findWaldo(supernatural)) // should log: 'unknown'

CodePudding user response：

The Object.values() method returns an array of a given object's own enumerable string-keyed property values.

hence the output of unknown in array.

Object.values(object) returns values of object in array while Object.values(string) returns string split in a array

function findWaldo(obj) {

  let values = Object.keys(obj);

  if (values.includes('Waldo')) {
    return obj.Waldo;
  } else {
    return 'Where\'s Waldo?';
  }
};


// Uncomment these to check your work!
const DC = {
  'Bruce': 'Wayne',
  'Harley': 'Quinn'
}
const supernatural = {
  'Sam': 'Winchester',
  'Dean': 'Winchester',
  'Waldo': 'unknown'
}

console.log(findWaldo(DC)) // should log: 'Where's Waldo?'
console.log(findWaldo(supernatural)) // should log: 'unknown'

CodePudding user response：

As the comment said: return obj.Waldo; but it's simpler to just filter the keys and use the key to return the value or unknown:

const findWaldo = (name,obj) => obj[Object.keys(obj).filter(key => key===name)] || 'Where\'s Waldo?'


// Uncomment these to check your work!
const DC = {
  'Bruce': 'Wayne',
  'Harley': 'Quinn'
}
const supernatural = {
  'Sam': 'Winchester',
  'Dean': 'Winchester',
  'Waldo': 'unknown'
}

console.log(findWaldo('Waldo',DC)) // should log: 'Where's Waldo?'
console.log(findWaldo('Waldo',supernatural)) // should log: 'unknown'
console.log(findWaldo('Bruce',DC)) // should log: Wayne