Query Object Recursively

deepQueryObj.js

//pathArray is an array where array[0] is the first property in the query path, array[1] the next property, etc.
//Particularly helpful if you have the path to the value you want in string form. You can use split() to get the array form the string
//If you may have the string 'food.type.apple'
//use split('.') to get the string path to the value want in array form and pass to the queryObject function
//obj is the object you want to run the query against

queryObject: function (pathArray, obj) {
    //Takes path as an array and retreives the value
    const [head, ...rest] = pathArray;
    let value = ''

    if (rest.length <= 0) {
        value = obj[head];
        return value
    } else if (obj.hasOwnProperty(head)) {
        value = app.queryObject(rest, obj[head])
        return value
    } else {
        obj[head] = {};
        value = app.queryObject(rest, obj[head])
        return value
    }
}