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Message-ID: <80831da90911040459v3440b0f6hbc10f08f65a17239@mail.gmail.com>
Date: 2009-11-04T12:59:43Z
From: Ning Ma
Subject: turn off function output

Hi, everybody

Is there any way to turn off the output message of a function, maybe a
result of cat() or print() command in that function.
I only expected it to be executed quite and return a value. Any
intermediate messages can be omitted.

Thanks!

Ma