RangeObject

class RangeObject(startOrObject, end, step=1, group)

An object which represents a range of values.

Arguments
  • startOrObject (number|object()) – Beginning of range, or object literal with start and end properties.

  • end (number()) – End of range

  • step (number()) – Step size in range

  • group (number|undefined()) – Groups in range

Examples:

<caption>With implicit step size = 1.</caption>
let rangeObject = new RangeObject(0.5,3);
rangeObject.toArray();
// [ 0.5, 1.5, 2.5 ]
<caption>With explicit step size.</caption>
let rangeObject = new RangeObject(1,9,3);
rangeObject.toArray();
// [ 1, 4, 7 ]
<caption>With grouping.</caption>
let rangeObject = new RangeObject(1,9,3,2);
rangeObject.toArray();
// [ [ 1, 4 ], [ 7 ] ]

Examples

With implicit step size = 1

const { RangeObject } = require('dcp/range-object');

const rangeObject = new RangeObject(0.5, 3);
rangeObject.toArray();
// [ 0.5, 1.5, 2.5 ]

With explicit step size

const { RangeObject } = require('dcp/range-object');

const rangeObject = new RangeObject(1, 9, 3);
rangeObject.toArray();
// [ 1, 4, 7 ]

With grouping

const { RangeObject } = require('dcp/range-object');

const rangeObject = new RangeObject(1, 9, 3, 2);
console.log(rangeObject.toArray());
// [ [ 1, 4 ], [ 7 ] ]

Attributes

length

RangeObject.length

Number of elements in range, or number of groups if grouped.

Examples:

<caption>Without grouping</caption>
let rangeObject = new RangeObject(1,10,3);
rangeObject.toArray();
// [ 1, 4, 7, 10 ]
rangeObject.length;
// 4
<caption>With grouping</caption>
let rangeObject = new RangeObject(1,9,3,2);
rangeObject.toArray();
// [ [ 1, 4 ], [ 7 ] ]
rangeObject.length;
// 2

Methods

filter

See SuperRangeObject.filter()

slice

See SuperRangeObject.slice()

nthValue

RangeObject.nthValue(n)

Return nth value in range

Arguments
  • n (number()) –

Examples:

let rangeObject = new RangeObject(1,10,3,2);
rangeObject.toArray();
// [ [ 1, 4 ], [ 7, 10 ] ]
rangeObject.nthValue(1);
// [ 7, 10 ]

toString

RangeObject.toString()

Create string representation of range: [object RangeObject start,end,step,group]

toObject

RangeObject.toObject()

Create object literal for range with properties: start, end, step, and group.