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How can I call a subroutine using a variable?

Posted on 2003-03-23
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Last Modified: 2013-12-25
I have a whole bunch of subroutines written with names like this... Chapter1, Chapter2, Chapter3, etc.  I want to call these subroutines using a variable, like this...  &Chapter$num;

I tried doing this and the script fell flat on it's face.  Any ideas how I can accomplish this without rewriting the whole thing???
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Question by:Donboy
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ozo earned 400 total points
ID: 8193201
&{Chapter.$num};

#but I wouldn't reccomend that style.
#a better method would be to use references

@Chapter=(
\&Chapter0,
\&Chapter1,
\&Chapter2,
\&Chapter3,
\&Chapter4,
);

&{$Chapter[$num]||sub{"No such chapter"}};


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by:Donboy
ID: 8196343
Excellent!  Thanks a million. 100 pts coming your way.

Also, why wouldn't you recommend that style?  What's wrong with it?  Just curious.
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LVL 84

Expert Comment

by:ozo
ID: 8196532
Symbolic references are powerful, and slightly dangerous, in that it's
possible to intend (with the utmost sincerity) to use a
hard reference, and accidentally use a symbolic reference instead.
so only hard references are allowed under
use strict 'refs';
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