Mathematical Expressions in RE

[jncengineering]

Is it possible to include mathematical expressions in RE?

Taking the GiveDiscount10 rule example, I understand that the "Expression" is a string evaluated to a boolean. Depending on the result, the "SuccessEvent" is called or not.

{
        "RuleName": "GiveDiscount10",
        "SuccessEvent": "10",
        "ErrorMessage": "One or more adjust rules failed.",
        "ErrorType": "Error",
        "RuleExpressionType": "LambdaExpression",
        "Expression": "input1.country == \"india\" AND input1.loyalityFactor <= 2 AND input1.totalPurchasesToDate >= 5000 AND input2.totalOrders > 2 AND input3.noOfVisitsPerMonth > 2"
 }

In my particular case, I would like to be able for example, to calculate the area of the rectangle from two parameters (Length x Width) and assign the result to another variable (Area) - Area = Length x Width. Something like:

{
        "RuleName": "AreaCalculation",
        "SuccessEvent": "area",
        "ErrorMessage": "Length or Width not valid",
        "ErrorType": "Error",
        "RuleExpressionType": "LambdaExpression",
        "Expression": "Func<int, int, int> area = (length, width) => length * width"
}

Is it possible to assign results of mathematical expressions to other variables for further use using RE?

[abbasc52]

If you are looking for assigning a variable to use later, have a look at ScopedParams

If you want custom output, you can use Post rule execution actions

Hope this helps 😄