Numeric aggregation functions
$sum()
Signature: $sum(array)
Returns the arithmetic sum of an array of numbers. It is an error if the input array contains an item which isn't a number.
Example
$sum([5,1,3,7,4])=>20
$max()
Signature: $max(array)
Returns the maximum number in an array of numbers. It is an error if the input array contains an item which isn't a number.
Example
$max([5,1,3,7,4])=>7
$min()
Signature: $min(array)
Returns the minimum number in an array of numbers. It is an error if the input array contains an item which isn't a number.
Example
$min([5,1,3,7,4])=>1
$average()
Signature: $average(array)
Returns the mean value of an array of numbers. It is an error if the input array contains an item which isn't a number.
Example
$average([5,1,3,7,4])=>4