public/subjects/manipulate-entries

Manipulate Entries

Instructions

Finish your groceries!!!

Create 3 functions that works like the .filter, .map and .reduce array method but for the entries of the grocery cart.

• filterEntries filters using both key and value.
• mapEntries changes either the key or the value or both.
• reduceEntries reduce over entries.

Create 3 other functions that use your previously create functions:

• totalCalories that will return the total calories of a cart
• lowCarbs that will leave only items that total carbs are lower than 50grams
• cartTotal that will give you the right amount of calories, proteins, ..., of all items in your grocery cart.

Clarification

What the functions will take as argument is an object cart which contains the food rations. All the nutrition in the nutritionDB object are measured per 100 grams.

Notions

• devdocs.io/javascript/global_objects/array/filter
• devdocs.io/javascript/global_objects/array/map
• devdocs.io/javascript/global_objects/array/reduce
• devdocs.io/javascript/global_objects/object/entries
• devdocs.io/javascript/global_objects/object/fromentries

Code provided

all code provided will be added to your solution and doesn't need to be submited.

// small database with nutrition facts, per 100 grams
// 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   },
}