Functions Reference

FILEMAKER FUNCTIONS REFERENCE 179
Description
Multiple variables are allowed when using a list syntax that is enclosed in square brackets [ ] and is
separated by semicolons. For example:
Let([variable=value;variable2=value2];calculation)
The $ symbol references a local variable and two $$ symbols reference a global variable. An
optional repetition number appears in square brackets [ ] immediately after the variable name. For
example:
Let([$variable[repetition]=value;$$variable2=value2]{;calculation} )
The Let function sets the variables from left to right. You can use previously defined variables (for
example, variables that you defined with the Set
Variable script step) to define new variable values,
and you can nest one
Let function within another. If you use a previously defined variable within a
nested
Let function, the variable has scope only within the nested function (as if you had defined a
completely unique variable). See the City example shown below.
Once defined, local and global variables can be referenced in any calculation within their scope. The
scope of global variables is limited to the current file. The scope of local variables is the current
script. Local variables defined in a calculation are scoped to the file but are only available when
scripts are not running. A local and global variable (or even two local variables in different scripts)
can have the same name but they are treated as different variables and store different values.
Examples
Let(x=5;x*x) returns 25.
Let([x=5;squared=x*x;cubed=squared*x];cubed) returns 125.
Let(City=“Paris”;Let(City=“San Francisco”;City&“-“)&City) returns San
Francisco
- Paris.
The following example sets a local variable counter at repetition 50 with a value of 120:
Let($counter[50]=120;$counter[50]*2) returns 240.
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 variable
“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 )" )
The following example shows how to pass named parameters, while keeping the ability to check the
syntax of the second parameter of the
Let function (the example returns 6, 12):
ScriptParameter = "a = 5; b = 10"
Let([a = Evaluate("Let( [" & Get(ScriptParameter) & "]; a )"),b =
Evaluate("Let( [" & Get(ScriptParameter) & "]; b )")]; a+1 & ", " & b+2 )
Related topics
Contents
Functions reference (alphabetical list)