比较输入与数组JavaScript

Question

I currently have the following structure:

"name" : 'Invisibility',
    "ingredients" : { 
        "CatTail" : 2,
        "Arsenic" : 1,
        "Newt"    : 2,
    },
    "name" : "Super Strength",
    "ingredients" : {
        "Plutonium" : 2,
        "CatPee" :  5,
        "Rock" : 10
    }

I'm taking input as an array in the following way:

input = {
    firstIngredient  : firstQuantity,
    secondIngredient : secondQuantity,
    thirdIngredient  : thirdQuantity,
}

The idea is that I have a list of ingredients and quantities as input and now I want to see if the submitted values match one of the ingredients above.

Am I correct in thinking that I should create a function passing both items and doing a for loop over them and compare keys as described in this answer? Comparing Arrays of Objects in JavaScript

Thanks!

Answer 1

Regardless of how you're going to proceed, here's code that compares the input to a recipe:

 var recipes = [{ "name": 'Invisibility', "ingredients": { "CatTail": 2, "Arsenic": 1, "Newt": 2, } }, { "name": "Super Strength", "ingredients": { "Plutonium": 2, "CatPee": 5, "Rock": 10 } }]; var input = { "CatPee": 5, "Rock": 10, "Plutonium": 2, }; function matches(a, b) { var match = true; Object.keys(a).forEach(ingredient => { if (a[ingredient] !== b[ingredient]) match = false; }); return match; } recipes.forEach(recipe => { if (matches(input, recipe.ingredients)) console.log("match found: " + recipe.name); }); 

In the case of a mongodb query I guess you'd add some kind of custom filter which calls the comparison function.