topic Re: Difference Between User Defined Routines And User Defined Functions (used in Tmap) ? in Talend Studio

Difference Between User Defined Routines And User Defined Functions (used in Tmap) ?

Ray0801 — Mon, 02 Dec 2019 11:38:30 GMT

Both this terms have the same procedure and have been used interchangebly,which is quite confusing!.

Re: Difference Between User Defined Routines And User Defined Functions (used in Tmap) ?

PhilHibbs — Mon, 02 Dec 2019 12:04:39 GMT

In traditional programming, "routine" and "function" are sometimes interchanged, the difference is only subtle, and in some languages nonexistent.

A routine is a function that does not return a value, and therefore cannot be used in an expression.

A function is a routine that returns a value, and therefore can be used in expressions.

So for a language like C or Java, where there are no true routines (only functions with a return type of void), the two terms are often used interchangeably.

Re: Difference Between User Defined Routines And User Defined Functions (used in Tmap) ?

Ray0801 — Mon, 02 Dec 2019 12:36:42 GMT

So are this both same even in the Talend Tool perspective.

Re: Difference Between User Defined Routines And User Defined Functions (used in Tmap) ?

TRF — Mon, 02 Dec 2019 12:39:53 GMT

Routines are shared within the project.
tMap functions are visible only in the tMap where they are defined.
Definitively, you can do much more things with routines.

Re: Difference Between User Defined Routines And User Defined Functions (used in Tmap) ?

PhilHibbs — Mon, 02 Dec 2019 13:15:22 GMT

Ah, you know what I didn't know about tMap functions so please disregard my history lesson in this context!