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README.md |
README.md
Manipulate Values
Instructions
Let's buy groceries.
You have a grocery cart with some items you need. The item's name is the key
, and the value
will represent nutrition facts per 100 grams.
Create 3 functions that work like the .filter
, .map
and .reduce
array methods, for the values in your grocery cart object. You can see their function names and how they work in the examples.
Examples
const nutrients = { carbohydrates: 12, protein: 20, fat: 5 }
console.log(filterValues(nutrients, (nutrient) => nutrient <= 12))
// output: { carbohydrates: 12, fat: 5 }
console.log(mapValues(nutrients, (v) => v+1))
// output: { carbohydrates: 13, protein: 21, fat: 6 }
console.log(reduceValues(nutrients, (acc, cr) => acc + cr))
// output: 37
You will have a small database to help you with the groceries.
Code provided
The provided code will be added to your solution, and does not need to be submitted.
// small database with nutrition facts, per 100 grams
// In this exercise this is used for testing purposes only
// prettier-ignore
const nutritionDB = {
tomato: { calories: 18, protein: 0.9, carbs: 3.9, sugar: 2.6, fiber: 1.2, fat: 0.2 },
vinegar: { calories: 20, protein: 0.04, carbs: 0.6, sugar: 0.4, fiber: 0, fat: 0 },
oil: { calories: 48, protein: 0, carbs: 0, sugar: 123, fiber: 0, fat: 151 },
onion: { calories: 0, protein: 1, carbs: 9, sugar: 0, fiber: 0, fat: 0 },
garlic: { calories: 149, protein: 6.4, carbs: 33, sugar: 1, fiber: 2.1, fat: 0.5 },
paprika: { calories: 282, protein: 14.14, carbs: 53.99, sugar: 1, fiber: 0, fat: 12.89 },
sugar: { calories: 387, protein: 0, carbs: 100, sugar: 100, fiber: 0, fat: 0 },
orange: { calories: 49, protein: 0.9, carbs: 13, sugar: 9, fiber: 0.2, fat: 0.1 },
}