freecodecamp--freecodecamp/curriculum/challenges/english/blocks/daily-coding-challenges-javascript/69cfca90e8a0a6d4d6871c53.md

id, title, challengeType, dashedName

id	title	challengeType	dashedName
69cfca90e8a0a6d4d6871c53	Challenge 269: Allergen Friendly Meals	28	challenge-269

--description--

Given an array of meals and an array of allergens to avoid, return the names of all the meals that contain none of the given allergens.

• Each meal is in the format [meal, allergens], where meal is the name of the meal, and allergens is an array of the allergens the meal contains. For example, ["pasta", ["wheat", "milk"]].
• Allergens to avoid will be an array of strings.

Return safe meal names in the same order given. If no meal is safe, return an empty array.

--hints--

getAllergenFriendlyMeals([["pasta", ["wheat", "milk"]], ["salad", ["nuts"]]], ["milk"]) should return ["salad"].

assert.deepEqual(getAllergenFriendlyMeals([["pasta", ["wheat", "milk"]], ["salad", ["nuts"]]], ["milk"]), ["salad"]);

getAllergenFriendlyMeals([["steak", ["soy"]], ["fried rice", []], ["fish tacos", ["fish", "wheat"]], ["chicken parmesan", ["wheat", "milk"]]], ["soy", "fish"]) should return ["fried rice", "chicken parmesan"].

assert.deepEqual(getAllergenFriendlyMeals([["steak", ["soy"]], ["fried rice", []], ["fish tacos", ["fish", "wheat"]], ["chicken parmesan", ["wheat", "milk"]]], ["soy", "fish"]), ["fried rice", "chicken parmesan"]);

getAllergenFriendlyMeals([["oatmeal", ["nuts"]], ["pancakes", ["wheat", "milk"]], ["granola", []], ["yogurt", ["milk"]], ["eggs", ["eggs", "milk"]], ["toast", ["wheat"]]], ["eggs", "milk"]) should return ["oatmeal", "granola", "toast"].

assert.deepEqual(getAllergenFriendlyMeals([["oatmeal", ["nuts"]], ["pancakes", ["wheat", "milk"]], ["granola", []], ["yogurt", ["milk"]], ["eggs", ["eggs", "milk"]], ["toast", ["wheat"]]], ["eggs", "milk"]), ["oatmeal", "granola", "toast"]);

getAllergenFriendlyMeals([["oatmeal", ["nuts"]], ["pancakes", ["wheat", "milk"]], ["granola", []], ["yogurt", ["milk"]], ["eggs", ["eggs", "milk"]], ["toast", ["wheat"]]], ["wheat", "nuts"]) should return ["granola", "yogurt", "eggs"].

assert.deepEqual(getAllergenFriendlyMeals([["oatmeal", ["nuts"]], ["pancakes", ["wheat", "milk"]], ["granola", []], ["yogurt", ["milk"]], ["eggs", ["eggs", "milk"]], ["toast", ["wheat"]]], ["wheat", "nuts"]), ["granola", "yogurt", "eggs"]);

--seed--

--seed-contents--

function getAllergenFriendlyMeals(meals, allergens) {

  return meals;
}

--solutions--

function getAllergenFriendlyMeals(meals, allergens) {
  return meals
    .filter(([name, mealAllergens]) =>
      !allergens.some(a => mealAllergens.includes(a)))
    .map(([name]) => name);
}