Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Algorithm to sum ranges that lie within another separate range in JavaScript
We have two sets of ranges; one is a single range of any length (R1) and the other is a set of ranges (R2) some or parts of which may or may not lie within the single range (R1).
We need to calculate the sum of the ranges in (R2) - whole or partial - that lie within the single range (R1).
const R1 = [20,40]; const R2 = [[14,22],[24,27],[31,35],[38,56]];
Result
= 2+3+4+2 = 11
R1 = [120,356]; R2 = [[234,567]];
Result
122
Example
Let us write the code −
const R1 = [20,40];
const R2 = [[14,22],[24,27],[31,35],[38,56]];
const R3 = [120,356];
const R4 = [[234,567]];
function sumRanges(range, values) {
const [start, end] = range;
const res = values.reduce((acc, val) => {
const [left, right] = val;
const ex1 = Math.min(right, end);
const ex2 = Math.max(left, start);
const diff = ex1 - ex2;
return acc + Math.max(0, diff);
}, 0);
return res;
};
console.log(sumRanges(R1, R2));
console.log(sumRanges(R3, R4));Output
And the output in the console will be −
11 122
Updated on: 20-Nov-2020
49 Views
Advertisements