What is the most effective way to alter the elements in a JavaScript array based on the total count of another element's value?

Question

What is the most effective way to alter the elements in a JavaScript array based on the total count of another element's value?

I have a task where I need to manipulate an array by adding or removing elements based on the total count of another value.

let data = [
    {
  "details": [
    {
      "Name": "DataSet1",
      "Severity": "4",
      "Cost": 20
    },
    {
      "Name": "DataSet2",
      "Severity": "4",
      "Cost": 30
    },
    {
      "Name": "DataSet3",
      "Severity": "4",
      "Cost": 25
    }
  ],
  "charge": 45
}
];

My goal is to create a new array where the total value of the Cost property is close to, or less than, the charge property in the object. In the given example, the total cost is 75 which exceeds the charge of 45. So, my approach was as follows:

Calculate the difference between the charge and the total cost. If the difference is greater than the charge, remove elements from the array to ensure that the new array's total cost is less or close to the charge. The modified array should look like this:

let newdata = [
    {
  "details": [
    {
      "Name": "DataSet1",
      "Severity": "4",
      "Cost": 20
    },
    {
      "Name": "DataSet3",
      "Severity": "4",
      "Cost": 25
    }
  ],
  "charge": 50
}
];

Is there a more efficient way to achieve this task? Are there any built-in functionalities in JavaScript that can help with this specific type of manipulation? Let me know if you have any suggestions or recommendations.

javascript arrays json javascript-objects

Answer 1

Answer №1

const numbers = {
  "value1": 10,
  "list": [{
      "Number": "Number1",
      "Category": "2",
      "Amount": 5
    },
    {
      "Number": "Number2",
      "Category": "2",
      "Amount": 8
    }, {
      "Number": "Number3",
      "Category": "2",
      "Amount": 7
    }
  ],
};
const addNumbersAndStayBelowValue =
  (value, array, begin = 0, currentTotal = 0, outcome = []) => {
    if (begin === array.length) return outcome
    const {
      Amount
    } = array[begin]
    const newTotal = currentTotal + Amount
    if (newTotal > value) return outcome
    return addNumbersAndStayBelowValue(value, array, begin + 1, newTotal, [...outcome, array[begin]]);
  }

console.log(addNumbersAndStayBelowValue(numbers.value1, numbers.list))

Answer 2

const numbers = {
  "value1": 10,
  "list": [{
      "Number": "Number1",
      "Category": "2",
      "Amount": 5
    },
    {
      "Number": "Number2",
      "Category": "2",
      "Amount": 8
    }, {
      "Number": "Number3",
      "Category": "2",
      "Amount": 7
    }
  ],
};
const addNumbersAndStayBelowValue =
  (value, array, begin = 0, currentTotal = 0, outcome = []) => {
    if (begin === array.length) return outcome
    const {
      Amount
    } = array[begin]
    const newTotal = currentTotal + Amount
    if (newTotal > value) return outcome
    return addNumbersAndStayBelowValue(value, array, begin + 1, newTotal, [...outcome, array[begin]]);
  }

console.log(addNumbersAndStayBelowValue(numbers.value1, numbers.list))

What is the most effective way to alter the elements in a JavaScript array based on the total count of another element's value?

Answer №1

Similar questions

Guide to accessing and updating data in various tabs within a Google spreadsheet

Java: techniques for parsing this JSON

Within jQuery lies the power to perform multiplication operations effortlessly

How can you retrieve the X.509 Certificate from a P12 file using Node JS?

Guide on how to use plain JavaScript to smoothly scroll to the page top

How to display JSON images in an Android listview

Establishing a PHP session variable and then initiating a redirect to a new page through the HREF method

Can Mongoose handle document arrays editing and version control efficiently?

Is there a way to display my current connected clients to a new client using socket.io?

Unlock maximum screen viewing on your custom video player with these steps to activate fullscreen

Tips for accessing elements using document.getElementsByTagName

Tips for shuffling the sequence of EJS variables

contrasting two methods of declaring arrays in C++

When running through a loop, the JSON array data containing the merged arrays is not being shown as expected

Utilizing a StyledComponents theme within a Component

Endless scrolling feature malfunctioning

Tips for eliminating unnecessary module js calls in Angular 9

Execute the function that has been passed through a data attribute

combine a pair of elements simultaneously

What is the reason behind using AJAX to attempt sending a new URL request on