Building a Nutrition Calculator in JavaScript: filter, map, and reduce on Objects
The article discusses building a nutrition calculator in JavaScript using object utility functions. It introduces three functions that mimic array methods for filtering, mapping, and reducing data on objects. The calculator utilizes a nutrition database to compute total calories and filter items based on carbohydrate content.
- ▪The nutrition calculator uses JavaScript's filter, map, and reduce methods adapted for objects.
- ▪It includes a nutrition database with various food items and their nutritional values per 100g.
- ▪Three utility functions are created to simplify operations on objects, enhancing code readability.
Opening excerpt (first ~120 words) tap to expand
try { if(localStorage) { let currentUser = localStorage.getItem('current_user'); if (currentUser) { currentUser = JSON.parse(currentUser); if (currentUser.id === 3719991) { document.getElementById('article-show-container').classList.add('current-user-is-article-author'); } } } } catch (e) { console.error(e); } Daniel Keya Posted on May 21 Building a Nutrition Calculator in JavaScript: filter, map, and reduce on Objects #beginners #web #javascript JavaScript's Array.prototype.filter, map, and reduce are well-known — but what about running the same operations on plain objects? In this post we'll walk through a compact nutrition calculator that wraps those patterns into reusable object utilities, then uses them to power real food math.
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