Guide on sorting an array within a specific range and extracting a sample on each side of the outcome

Question

Guide on sorting an array within a specific range and extracting a sample on each side of the outcome

I need a simple solution for the following scenario:

let rangeOfInterest = [25 , 44];
let input = [10, 20, 30, 40, 50, 60];

I want to extract values that fall between 25 and 44 (inclusive) from the given input. The range may be within or outside the input values completely, for example [85, 95] or [0, 100].

output1 = [30, 40];

If there are values adjacent to this output, I also want to include them;

finalOutput = [20, 30, 40, 50];

Currently, I achieve this by filtering the array and identifying the indexes of the first and last elements in the result to extract additional samples if needed. Is there a more concise approach without using approximately 20 lines of code?

Note: The sample values will be floating-point numbers, but integers are used in this simplified example.

javascript arrays typescript

Answer 1

Answer №1

To identify the index of the first element greater than the minimum range and the index of the initial element larger than the maximum range, slice based on these indexes (minIndex - 1, maxIndex + 1).

const findRange = ([min, max], numbers) => {
  const startIdx = numbers.findIndex(num => num > min);
  const endIdx = numbers.findIndex(num => num > max);
    
  return numbers.slice(
    startIdx > 1 ? startIdx - 1 : 0,
    endIdx === -1 ? numbers.length : endIdx + 1
  );
};


const data = [10, 20, 30, 40, 50, 60];

console.log(findRange([25 , 44], data));

console.log(findRange([25 , 65], data));

console.log(findRange([-25 , 65], data));

Answer 2

To identify the index of the first element greater than the minimum range and the index of the initial element larger than the maximum range, slice based on these indexes (minIndex - 1, maxIndex + 1).

const findRange = ([min, max], numbers) => {
  const startIdx = numbers.findIndex(num => num > min);
  const endIdx = numbers.findIndex(num => num > max);
    
  return numbers.slice(
    startIdx > 1 ? startIdx - 1 : 0,
    endIdx === -1 ? numbers.length : endIdx + 1
  );
};


const data = [10, 20, 30, 40, 50, 60];

console.log(findRange([25 , 44], data));

console.log(findRange([25 , 65], data));

console.log(findRange([-25 , 65], data));

Answer 3

Answer №2

Give this a shot:

let data = [10, 20, 30, 40, 50, 60];
let range = [25 , 44];

let selectedValues = data.filter(function(value) {
  return Math.min(...range) <= value && Math.max(...range) >= value;
});

selectedValues.push( Math.floor(Math.min(...range) / 10) * 10 ); //adding 20
selectedValues.push( Math.floor(Math.max(...range) / 10) * 10 ); // adding 40

console.log(selectedValues)

Answer 4

Give this a shot:

let data = [10, 20, 30, 40, 50, 60];
let range = [25 , 44];

let selectedValues = data.filter(function(value) {
  return Math.min(...range) <= value && Math.max(...range) >= value;
});

selectedValues.push( Math.floor(Math.min(...range) / 10) * 10 ); //adding 20
selectedValues.push( Math.floor(Math.max(...range) / 10) * 10 ); // adding 40

console.log(selectedValues)

Answer 5

Answer №3

let roiValues = [25 , 44]; //adjusting range of interest variable name
    let numbersArray = [10, 20, 30, 40, 50, 60];
    function checkInRange(value1, value2){//assuming value1<value2 always
    return (number)=>{
         return number>=value1 && number<=value2;
       }
    }
    let startIndex=0;
    let endIndex=0;
    var filteredArray = numbersArray.filter((value, index) => {
           let isMatched = checkInRange(roiValues[0],roiValues[1])(value);
           if(!startIndex){
              startIndex=isMatched?index:0;
           }
           endIndex = isMatched&&(index>endIndex)?index:endIndex;
           return isMatched;
           });
    endIndex<numbersArray.length?filteredArray.push(numbersArray[endIndex+1]):'';
    startIndex>0?filteredArray.splice(0,0,numbersArray[startIndex-1]):'';
    console.log(filteredArray);

Answer 6

let roiValues = [25 , 44]; //adjusting range of interest variable name
    let numbersArray = [10, 20, 30, 40, 50, 60];
    function checkInRange(value1, value2){//assuming value1<value2 always
    return (number)=>{
         return number>=value1 && number<=value2;
       }
    }
    let startIndex=0;
    let endIndex=0;
    var filteredArray = numbersArray.filter((value, index) => {
           let isMatched = checkInRange(roiValues[0],roiValues[1])(value);
           if(!startIndex){
              startIndex=isMatched?index:0;
           }
           endIndex = isMatched&&(index>endIndex)?index:endIndex;
           return isMatched;
           });
    endIndex<numbersArray.length?filteredArray.push(numbersArray[endIndex+1]):'';
    startIndex>0?filteredArray.splice(0,0,numbersArray[startIndex-1]):'';
    console.log(filteredArray);

Guide on sorting an array within a specific range and extracting a sample on each side of the outcome

Answer №1

Answer №2

Answer №3

Similar questions

Cannot assign border to an undefined element - JavaScript

The client continues to request the file through the REST API

What is causing the array elements to be iterated through multiple times?

A Guide to Making a Floating Widget That Can Move Beyond the Boundaries of a Website in React

How to trigger a function when clicking on a TableRow in React using MaterialUI

Differences Between Pointers for int and char Arrays in C

Running a Jest test that triggers process.exit within an eternal setInterval loop with a latency of 0, all while utilizing Single

Chrome Extension for Extracting Data from Websites

What is the reason behind VueJS animations only functioning in a single direction?

Does using .detach() eliminate any events?

Why does the ReactJS MaterialUI Modal fail to update properly?

Moving icon that appears when hovering over a menu button

Delete ObjectId from Array using Node and Mongoose

Sorting custom strings in Javascript with special characters like dash (-) and underscore (_)

Changing the fill color of an SVG pattern remains unchanged

Sending an array from JavaScript to PHP and then back to JavaScript

Automatically selecting checkboxes from an array using ReactJS

Asynchronous and nested onSnapshot function in Firestore with await and async functionality

Error encountered with select2 when using a remote JSONP dataset

Instructions for incorporating a TypeScript type into a Prisma model