Latest release - 2.138.0ΒΆ
User Documentation - CDM Eligible Collateral Representation
What is being released
This release adds Eligible Collateral Representation user documentation to the documentation website. For reference, the document has already had a peer review and has previously been published as a PDF to ISDA members.
Review Directions
DSL Syntax - Reduce keyword to merge or aggregate a list
What is being released
This release introduces the reduce keyword to merge or aggregate the items of a list into a single item based on an expression. The reduce keyword can be used to implement simple operations such as summing a list of numbers, joining a list of strings, or finding a maximum or minimum value in a list, and well as operations on complex objects.
Upcoming releases will contain additional syntax to more concisely specify simple operations sum, join, min and max.
Syntax
reduce <parameter1>, <parameter1> [ <expression to merge or aggregate any two list items, parameter1 and parameter2> ]
Example
In the example below, the input list of numbers are combined by addition.
func SumNumbers: inputs: numbers number (0..*) output: total number (1..1) set total: numbers reduce a, b [ a + b ]Example
In the example below, the input list of strings are concatenated together along with a delimiter. Given a list "a", "b", "c", and a delimiter ",", the resulting string would be "a,b,c".
func JoinStrings: inputs: strings string (0..*) delimiter string (1..1) output: result string (1..1) set result: strings reduce a, b [ a + delimiter + b ]Example
In the example below, the input list of numbers are aggregated to find the maximum number. Given two list items, n1 and n2; keep the greater item and discard the lesser item.
func FindMaxNumber: inputs: numbers number (0..*) output: max number (1..1) set max: numbers reduce n1, n2 [ if n1 > n2 then n1 else n2 ]Example
In the example below, the input list of Vehicle are aggregated to find the vehicle with the most powerful engine.
func FindVehicleWithMaxPower: inputs: vehicles Vehicle (0..*) output: vehicleWithMaxPower Vehicle (1..1) set vehicleWithMaxPower: vehicles reduce v1, v2 [ if v1 -> specification -> engine -> power > v2 -> specification -> engine -> power then v1 else v2 ]Review Directions
In the CDM Portal, select the Textual Browser, and search for usages such as Sum.