Set of ranges

Install

npm i set-of-ranges

Usage

1. import

   import { RangeSet } from "set-of-ranges";

2. construct

   let rs = new RangeSet("(10,20][40,infinity)");
   //or
   let ranges = [
     {
       value: 1,
       equal: true,
     },
     {
       value: 2,
       equal: false,
     },
   ]; // or = parseRanges("[1,2)");
   let rs = new RangeSet(ranges);

   If construct with a string, it will use parseRanges to parse the string to Ranges.

   When use parseRanges, spaces and lower/uppercases are ignored. When input is not allowed, it throws an error.

3. operate

   import { parseRanges, RangeSet, stringifyRanges } from "set-of-ranges";
   let rs1: RangeSet, rs2: RangeSet, rs3: RangeSet;
   rs1.union(rs2); // ============= rs1 = operate(truthTable_union, rs1, rs2);
   rs1.intersection(rs2); // ====== rs1 = operate(truthTable_intersection, rs1, rs2);
   
   // You can also do operation to more than 2 ranges.
   rs1.union(rs2, rs3); // ========== rs1 = operate(truthTable_union, rs1, operate(truthTable_union, rs4, rs3));
   
   // You can use a customized truth table, too.
   rs1.operate(
     [
       [false, false],
       [false, true],
     ],
     rs2
   );

   TruthTable

   Copied from sourcecode.

   export type OperateTruthTable = [
     //          R:true    R:false
     /*L:true */ [boolean, boolean],
     /*L:flase*/ [boolean, boolean]
   ];

4. output

   import { RangeSet, stringifyRanges } from "set-of-ranges";
   let rs1 = new RangeSet("(10  ,20][ 40,infinity )");
   console.log(stringifyRanges(rs1)); //=> "(10,20][40,infinity)"

Authors

_Kerman @ UniCoderGroup

License

MIT License