Filter an array of objects with key/value pairs

matchObjects.js

const _ = require('underscore');
arr = [
    {
        car: "toyota",
        color: "blue",
        year: 2010,
        trans: "auto",
        warrantyEnd: "2013"
    },
    {
        car: "toyota",
        condition: "good",
        color: "green",
        year: 2010,
        trans: "manual",
        warrantyEnd: "2013",
    },
    {
        car: "ford",
        color: "yellow",
        year: 2012,
        trans: "auto",
        warrantyEnd: "2015"
    }
];

//########################################
// Filter array using same data types
//########################################
filters = {
    trans: "manual",
    year: 2010,
    condition: "good"
};

const filteredResults = _.filter(arr, filters);

console.log(filteredResults);
/* [ { car: 'toyota',
    condition: 'good',
    color: 'green',
    year: 2010,
    trans: 'manual',
    warrantyEnd: '2013' } ] */

//################################################################
// Filter array using different data types (better for user error)
//################################################################
diffDataTypeFilters = {
    trans: "manual",
    year: "2010",
    condition: "good",
    warrantyEnd: 2013
};

// Convert existing array values to strings
const newArr = arr.map(item => _.mapObject(item, val => { return val.toString() }));
// Ensure data/json brought in to only have strings for values
const modifiedFilters = _.mapObject(diffDataTypeFilters, val => { return val.toString() });
// Filter
const newFilteredResults = _.filter(newArr, modifiedFilters);

console.log(newFilteredResults);
/*[ { car: 'toyota',
    condition: 'good',
    color: 'green',
    year: '2010',
    trans: 'manual',
    warrantyEnd: '2013' } ] */