Functions Reference

Logical functions
F
ILEMAKER FUNCTIONS REFERENCE 229
Evaluate
Purpose
Evaluates an expression as a calculation.
Format
Evaluate(expression{;[field1;field2;field3;...]})
Parameters
expression - any text expression or text field.
fields - a list of fields that this function is dependent on. When these fields are modified, the
calculation will update its result.
Parameters in braces { } are optional. Notice that the optional field list is enclosed in brackets [ ].
Data type returned
text, number, date, time, timestamp, container
Originated in
FileMaker Pro 7.0
Description
The optional fields parameter is a list of fields this calculation is dependent on. If a necessary field
isn’t listed, modifying that dependent field won’t update the result of the calculation.
Examples
Evaluate(TextField) returns 4 when TextField contains 2 + 2.
Evaluate("textfield") returns 2 + 2 when textfield contains 2 + 2.
Evaluate(GetField("textfield")) returns 4 when textfield contains 2 + 2.
Evaluate(TextField;[Amount]) returns .80 when TextField contains .08 * Amount and the
Amount field contains 10.00.
Evaluate(“Let(TaxRate=.05;“& Tax Rate Calculation &“)”) returns .50 when the
field Tax Rate Calculation contains SubTotal * TaxRate where SubTotal is a numeric field that
contains 10.00.
The following example shows how to pass named parameters using the Evaluate, Let, and
Get(ScriptParameter) functions, allowing access only to variable “a” (the example returns 6):
ScriptParameter = "a = 5; b = 10"
Evaluate("Let ( [" & Get(ScriptParameter) & "]; a + 1 )")
The following example shows how to pass named parameters, allowing access to both variable “a”
and
“b”. The simplified first parameter makes the second parameter more complex (the example
returns 6, 12):
ScriptParameter = "a = 5; b = 10"
Evaluate("Let ( [" & Get(ScriptParameter) & "]; a + 1 & \", \" & b + 2 )")