@lezram/math-interval

A very simple interval library

Installation

node

npm i @lezram/math-interval --save

Usage

NodeJS

Javascript

constInterval=require("@lezram/math-interval").Interval;consttimeInterval=newInterval(Date.UTC(2020,0,1),Date.UTC(2020,0,3),false,true);

Typescript

import{Interval}from"@lezram/math-interval";consttimeInterval=newInterval(Date.UTC(2020,0,1),Date.UTC(2020,0,3),false,true);

Browser

<scriptsrc="math-interval.js"></script><script>constInterval=MathInterval.Interval;consttimeInterval=newInterval(Date.UTC(2020,0,1),Date.UTC(2020,0,3),false,true);console.log(timeInterval);</script>

API

• new Interval(start: number, end: number, includeStart: boolean, includeEnd: boolean)
  Create an interval object

  newInterval(1,2,true,false);

• Interval.from(intervalNotation: string): Interval
  Create an interval object from mathematical interval notation

  Interval.from("[1,2]");

• Interval.sort(interval1, interval2, ...): Interval[]
  Sort intervals with following order: empty, lowest start, lowest end
• Interval.union(interval1, interval2, ...): Interval[]
  Union elements and sort

  constinterval1=newInterval(1,2,true,true);constinterval2=newInterval(2,4,false,false);constunion=Interval.union(interval1,interval2);// union = new Interval(1, 4, true, false);

• obj.isOverlapping(interval: Interval): boolean
  Checks if passed interval overlaps/intersect
• obj.contains(numberOrInterval: number | Interval): boolean
  Contains passed number or interval completely
• obj.isEmpty(): boolean
  If is an empty interval {}, [2,1], (1,1), (1,1], [1,1)
• obj.copy(): Interval
  Copy interval
• obj.isEqual(interval: Interval): boolean
  Check if interval is equal

Similar libraries

• math.interval
• math-intervals
• math-interval
• math-interval-parser