Utilizing Javascript to extract an element with a property exceeding a specified amount, yet falling short of the following object in line

Question

Utilizing Javascript to extract an element with a property exceeding a specified amount, yet falling short of the following object in line

I am facing a challenge in my JavaScript code. I have an integer that represents the quantity of an order, and there is an object containing all the quantities offered with their respective prices:

    {
        "1": {
            "quantity": 1,
            "price": 10
        },
        "2": {
            "quantity": 2,
            "price": 20
        },
        "6": {
            "quantity": 6,
            "price": 50
        },
        "12": {
            "quantity": 12,
            "price": 80
        }
    }

The task at hand is to identify the object with a quantity value greater than the order quantity, but smaller than the quantity value of the next object in the sequence.

For instance, if the order quantity is 8, it should pick:

        "6": {
            "quantity": 6,
            "price": 50
        },

This information is crucial for determining the correct price. Even though I have experimented with multiple LoDash methods, none seem to provide the desired outcome. Is there a solution or approach that can help me achieve this?

javascript json vue.js ecmascript-6

Answer 1

Answer №1

To determine the count of smaller or equal values, you can reverse the array after obtaining the keys.

function findValues(obj, num) {
    return Object.keys(obj).reverse().find(val => val <= num);
}

var obj = { 1: { quantity: 1, price: 10 }, 2: { quantity: 2, price: 20 }, 6: { quantity: 6, price: 50 }, 12: { quantity: 12, price: 80 } };

console.log(findValues(obj, 8));

Answer 2

To determine the count of smaller or equal values, you can reverse the array after obtaining the keys.

function findValues(obj, num) {
    return Object.keys(obj).reverse().find(val => val <= num);
}

var obj = { 1: { quantity: 1, price: 10 }, 2: { quantity: 2, price: 20 }, 6: { quantity: 6, price: 50 }, 12: { quantity: 12, price: 80 } };

console.log(findValues(obj, 8));

Answer 3

Answer №2

After analyzing your description, it seems like you are attempting to locate the record that corresponds to the lowest quantity higher than the input quantity. However, the example provided does not align with that explanation. If you actually intend to find the next largest quantity smaller than the input, you may need to reverse the two inequalities.

    some_prices =  {
        "1": {
            "quantity": 1,
            "price": 10
        },
        "2": {
            "quantity": 2,
            "price": 20
        },
        "6": {
            "quantity": 6,
            "price": 50
        },
        "12": {
            "quantity": 12,
            "price": 80
        }
    }

    getNextQuantityPrice = (prices, quantity) => {
        const largerQuantities = Object.values(prices)
            .filter(value => value.quantity > quantity);
        if (largerQuantities.length === 0) return null;
        return largerQuantities
            .reduce((min, next) => next.quantity < min.quantity ? next : min)
    }

    console.log(JSON.stringify(getNextQuantityPrice(some_prices, 2)));

Answer 4

After analyzing your description, it seems like you are attempting to locate the record that corresponds to the lowest quantity higher than the input quantity. However, the example provided does not align with that explanation. If you actually intend to find the next largest quantity smaller than the input, you may need to reverse the two inequalities.

    some_prices =  {
        "1": {
            "quantity": 1,
            "price": 10
        },
        "2": {
            "quantity": 2,
            "price": 20
        },
        "6": {
            "quantity": 6,
            "price": 50
        },
        "12": {
            "quantity": 12,
            "price": 80
        }
    }

    getNextQuantityPrice = (prices, quantity) => {
        const largerQuantities = Object.values(prices)
            .filter(value => value.quantity > quantity);
        if (largerQuantities.length === 0) return null;
        return largerQuantities
            .reduce((min, next) => next.quantity < min.quantity ? next : min)
    }

    console.log(JSON.stringify(getNextQuantityPrice(some_prices, 2)));

Answer 5

Answer №3

If you're looking to loop through the keys of a Javascript object, there are plenty of resources available that have addressed this issue repeatedly.

var prices = {
        "1": {
            "quantity": 1,
            "price": 10
        },
        "2": {
            "quantity": 2,
            "price": 20
        },
        "6": {
            "quantity": 6,
            "price": 50
        },
        "12": {
            "quantity": 12,
            "price": 80
        }
    };

for (qty in prices) {
  // Do stuff
  console.log(qty);
}

If you simply want to extract the available quantities (object keys), you can utilize Object.keys(prices), which provides an array for easy iteration.

Once you've converted the data into an array, you can further manipulate it using additional for loops, or explore more advanced options like forEach(), filter(), and similar methods.

Answer 6

If you're looking to loop through the keys of a Javascript object, there are plenty of resources available that have addressed this issue repeatedly.

var prices = {
        "1": {
            "quantity": 1,
            "price": 10
        },
        "2": {
            "quantity": 2,
            "price": 20
        },
        "6": {
            "quantity": 6,
            "price": 50
        },
        "12": {
            "quantity": 12,
            "price": 80
        }
    };

for (qty in prices) {
  // Do stuff
  console.log(qty);
}

If you simply want to extract the available quantities (object keys), you can utilize Object.keys(prices), which provides an array for easy iteration.

Once you've converted the data into an array, you can further manipulate it using additional for loops, or explore more advanced options like forEach(), filter(), and similar methods.

Answer 7

Answer №4

In my view, the most effective way to address the fundamental question is to reverse the list, like many other responses have suggested. Instead of relying on the original object's order to be as desired, it is preferable to sort it at the beginning and then carry out the operations in reverse order.

const determineNextQuantity = (quantities) => {
  const reversed = Object .values (quantities) .sort (({quantity: q1}, {quantity: q2}) => q2 - q1)
  return (requested) => reversed .find (({quantity}) => quantity < requested)
}

const quantities = {1: {quantity: 1, price: 10}, 2: {quantity: 2, price: 20}, 6: {quantity: 6, price: 50}, 12: {quantity: 12, price: 80}}

console .log (
  determineNextQuantity (quantities) (8)
)

This approach also allows for storing an intermediate function that eliminates the need to repeatedly reverse the list with every call. The

determineNextQuantity(quantities)

function generates a reusable function for determining the next quantity based on requests.

If maintaining the output format specified in the question is crucial (i.e., not just {quantity: 6, price: 50}, but wrapping the result in a single-property object like {'6': {quantity: 6, price: 50}}), you could reconfigure it as follows:

const determineNextQuantity = (quantities) => {
  const reversed = Object .values (quantities) .sort (({quantity: q1}, {quantity: q2}) => q2 - q1)
  return (requested) => {
    const q = reversed .find (({quantity}) => quantity < requested)
    return {[q.quantity]: q}
  }
}

However, personally I find working with this format to be more challenging.

Answer 8

In my view, the most effective way to address the fundamental question is to reverse the list, like many other responses have suggested. Instead of relying on the original object's order to be as desired, it is preferable to sort it at the beginning and then carry out the operations in reverse order.

const determineNextQuantity = (quantities) => {
  const reversed = Object .values (quantities) .sort (({quantity: q1}, {quantity: q2}) => q2 - q1)
  return (requested) => reversed .find (({quantity}) => quantity < requested)
}

const quantities = {1: {quantity: 1, price: 10}, 2: {quantity: 2, price: 20}, 6: {quantity: 6, price: 50}, 12: {quantity: 12, price: 80}}

console .log (
  determineNextQuantity (quantities) (8)
)

This approach also allows for storing an intermediate function that eliminates the need to repeatedly reverse the list with every call. The

determineNextQuantity(quantities)

function generates a reusable function for determining the next quantity based on requests.

If maintaining the output format specified in the question is crucial (i.e., not just {quantity: 6, price: 50}, but wrapping the result in a single-property object like {'6': {quantity: 6, price: 50}}), you could reconfigure it as follows:

const determineNextQuantity = (quantities) => {
  const reversed = Object .values (quantities) .sort (({quantity: q1}, {quantity: q2}) => q2 - q1)
  return (requested) => {
    const q = reversed .find (({quantity}) => quantity < requested)
    return {[q.quantity]: q}
  }
}

However, personally I find working with this format to be more challenging.

Utilizing Javascript to extract an element with a property exceeding a specified amount, yet falling short of the following object in line

Answer №1

Answer №2

Answer №3

Answer №4

Similar questions

Can a data filter be customized to fit a specific grid layout, ensuring that all images are displayed in a full column or at a designated size?

Guide to transferring a JavaScript/Ajax variable to a PHP webpage with the help of AJAX

Struggling with replicating the btn-dark style in this multi-level Bootstrap 4 dropdown clone

Tips for displaying a recommendation list when entering a tag in Bootstrap Vue

The functionality of GET_POST is not functioning properly

Ways to retrieve multiple outcomes in mongoose and merge them into a unified response

Every time I attempt to build a React application, I encounter the same error message. I even checked the log file, but it keeps showing the proxy error

Troubleshooting Block-scoped errors on Heroku using Node.js and Express

Most secure methods to safeguard videos from unauthorized downloading

Struggling to update state in React despite attempts to modify the state

Python's String Manipulation Techniques

Changing the format of MediaWiki's information into basic text

Pairing a removal request with a JSON entity

Discovering the specific URL of a PHP file while transmitting an Ajax post request in a Wordpress environment

Struggling to retrieve JSON information from the database using AJAX

What could be causing an issue with CORS in ExpressJS in one scenario but not in another?

The error message "node Unable to iterate over property 'forEach' because it is undefined" appeared

Webpack behaving strangely with inability to use 'import', while 'require' is functioning properly

"Looking to transfer an array of object properties in a Vue.js application? Let's explore

JavaScript - exploring techniques to alter the relationship between parents and children