mathjs/docs/reference/functions/setSize.md

Function setSize

Count the number of elements of a (multi)set. When a second parameter is 'true', count only the unique values. A multi-dimension array will be converted to a single-dimension array before the operation.

Syntax

math.setSize(set)
math.setSize(set, unique)

Parameters

Parameter	Type	Description
a	Array | Matrix	A multiset

Returns

Type	Description
number	The number of elements of the (multi)set

Examples

math.setSize([1, 2, 2, 4])          // returns 4
math.setSize([1, 2, 2, 4], true)    // returns 3

See also

setUnion, setIntersect, setDifference