Question

Write a function favoriteColors that takes one parameter: colors (an array of three strings). The function should return a string in the format: “My favorite colors are [color1], [color2], and [color3].”
Answer-
function favoriteColors(colors) {
const [c1, c2, c3] = colors;
return `My favorite colors are ${c1}, ${c2}, and ${c3}.`;
}

Fix this code, make it correct, make sure the colors are clarified not just (c1,c2,c3)

Answer 1

Here's a corrected version with clearer variable names and input validation:

function favoriteColors(colors) {
if (!Array.isArray(colors) || colors.length !== 3) {
throw new TypeError('favoriteColors expects an array of exactly 3 color strings.');
}

const [color1, color2, color3] = colors;

if ([color1, color2, color3].some(c => typeof c !== 'string')) {
throw new TypeError('All three items in the array must be strings.');
}

return `My favorite colors are ${color1}, ${color2}, and ${color3}.`;
}

Example:
favoriteColors(['red', 'green', 'blue']);
// "My favorite colors are red, green, and blue."