Computing numeric differences
Return the absolute difference between the maximum and minimum numerical values in an array.
Overview
Use the diff() function in the expression of a matchmaking rule to compute the greatest difference between two or more values. For example, diff([ 4, 3, 2, 1 ]) returns 3, and diff([ 50, 19, 21, 61 ] returns 42.
Declaration
number diff(array[number] $values)Parameters
valuesAn array that contains the numeric values to compare.
Return value
The absolute difference between the maximum and minimum items in the values array.