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I was wondering how can you combine two variables (or more) that have the same string values, but different numbers.
For example, if you’re combining a list of ingredients that are present in two different recipes. For a shopping list, like:
let ingredient1 = 1 + " apple";
let ingredient2 = 2 + " apple";
//combining ingredient1 and ingredient 2 would produce something like totalIngredients = 3 apples;
I can kind of figure out the pluralization, but I can’t figure out how I can combine those two strings and for it to only increase the number if they’re matching.
>Solution :
Like others have noted, you should store your ingredients as objects. One way to achieve this is to have a class which stores the count and ingredient type. You can then define a function that checks for a given type and returns the count of ingredients.
class Ingredient {
constructor(count, type) {
this.count = count;
this.type = type;
}
};
const countByType = (type) => ingredients.reduce((sum, ingredient) => {
if (ingredient.type === type) {
return sum += ingredient.count;
}
return sum;
}, 0);
const ingredients = [];
ingredients.push(new Ingredient(1, "apple"));
ingredients.push(new Ingredient(2, "apple"));
ingredients.push(new Ingredient(5, "orange"));
console.log(`${countByType("apple")} apples`);
console.log(`${countByType("orange")} oranges`);If you prefer, you can achieve the same without classes as well:
const countByType = (type) => ingredients.reduce((sum, ingredient) => {
if (ingredient.type === type) {
return sum += ingredient.count;
}
return sum;
}, 0);
const ingredients = [];
ingredients.push({count: 1, type: "apple"});
ingredients.push({count: 2, type: "apple"});
ingredients.push({count: 5, type: "orange"});
console.log(`${countByType("apple")} apples`);
console.log(`${countByType("orange")} oranges`);