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Simple shell scripting question from a newbie.


Been looking through the various shell scripts that make up Debian as a 
way to learn bash & perl scripting.
So please be nice if this is a really dumb question.

Is a piece of code like the following...

while [ x"$1" != x ]; do

the same as using the -z flag for test.

It just looks like a weird way of doing things that occur frequently.

Please explain.


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