USER defined functions: Check if the function exists/loaded after Include

[#1]

Hi Folks,

I am trying to figure out a way to check if a user defined function exists before calling it. Is there a way to do this check in JMP?

Eg: 

user_func.jsl:

user_func = Function ({},{},

.....

);

Main.jsl:

Include("C:\Documents\user_func.jsl")

.

down in the code

.

.

??How to check if user_func exists??

[#2 · Accepted solution]

You can use the IsEmpty() function.  See the example below;

Clear Symbols();
Show( Is Empty( user_func ) );
user_func = Function( {}, {} );
Show( Is Empty( user_func ) );clear symbols();

[#3]

That worked, thank you very much !

[#4]

Hi Jim @txnelson ,

In another case, what to do if the function name is stored as a string in a variable?

Clear Symbols();

user_func = Function( {}, {} );

func_name = "user_func";

Show( Is Empty( Parse(func_name) ) ); //This doesnt work, any alternatives???

Clear Symbols();

[#5 · Accepted solution]

Here is how I would handle that case

func_name = "user_func";eval(parse("Show( Is Empty( " || func_name || ") ) ;"));

[#6]

Names Default to Here( 1 );

user_func = Function( {}, Print( "I'm Here!" ) );
func_name = "user_func";

Show( Is Empty( Parse( func_name || "()" ) ) );