Looping Through Objects

Using a for...in loop, you can iterate through the properties of an object. Run the starter code to see an example. You'd get the same result if you used a for...of loop and used Object.keys() to get an array of the keys:

for (let language of Object.keys(greeting)) {
  console.log(`Yes, I speak ${language}! ${greeting[language]}!`);
}

Tests

Write a function called keyValSwap. It should take a single input, an object, and return a new object where the keys are the values of the original object and the values are the keys. For example, passing

{ a: 'array', b: 'boolean', c: 'constant' };

to keyValSwap would return

{ array: 'a', boolean: 'b', constant: 'c' };

Hints:

• Use a for...in loop to iterate through the input object.
• Create an empty object that you can add key-value pairs as you loop through the original object. This object is what you'll return after you finish building it up.