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UNIX for Dummies Questions & Answers
Passing Hash Tables to Subroutines
Post 4885 by mirzabhai on Thursday 2nd of August 2001 03:04:32 PM
08-02-2001
Passing Hash Tables to Subroutines
Hi:
How do I pass a hash table down to a subroutine along with some other variables?
For example, I have say a subroutine play_with_hash:
sub play_with_hash
{
my( $var1, $var2, %my_hash ) = @_;
#do stuff with %my_hash
...........
}
Then I want to call the subroutine say in the main routine but i want to send a hash table in the main routine for the subroutine to use:
play_with_hash( $variableA, $variableB, %this_hash );
unfortunately this doesn't work, i get the hash through but $var1 and var2 don't get assigned the right value in the subroutine. any ideas people? THANKS!
How do I pass a hash table down to a subroutine along with some other variables?
For example, I have say a subroutine play_with_hash:
sub play_with_hash
{
my( $var1, $var2, %my_hash ) = @_;
#do stuff with %my_hash
...........
}
Then I want to call the subroutine say in the main routine but i want to send a hash table in the main routine for the subroutine to use:
play_with_hash( $variableA, $variableB, %this_hash );
unfortunately this doesn't work, i get the hash through but $var1 and var2 don't get assigned the right value in the subroutine. any ideas people? THANKS!
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LEARN ABOUT BSD
arc
PLOT(3F) PLOT(3F) NAME
plot: openpl et al. - f77 library interface to plot(3X) libraries. SYNOPSIS
subroutine openpl() subroutine erase() subroutine label(str) character str*(*) subroutine line(ix1, iy1, ix2, iy2) subroutine box(ix1, iy1, ix2, iy2) Draw a rectangle and leave the cursor at ( ix2,iy2). subroutine circle(ix, iy, ir) subroutine arc(ix, iy, ix0, iy0, ix1, iy1) subroutine move(ix, iy) subroutine cont(ix, iy) subroutine point(ix, iy) subroutine linemd(str) character str*(*) subroutine space(ix0, iy0, ix1, iy1) subroutine clospl() DESCRIPTION
These are interface subroutines, in the library -lf77plot, allowing f77 users to call the plot(3X) graphics routines which generate graphic output in a relatively device-independent manner. The f77 subroutine names are the same as the C function names except that linemod and closepl have been shortened to linemd and clospl . See plot(5) and plot(3X) for a description of their effect. Only the first 255 character in string arguments to label and linemd are used. This library must be specified in the f77(1) command before the device specific graphics library; for example, to compile and load a FOR- TRAN program in prog.f to run on a Tektronix 4014 terminal: f77 prog.f -lf77plot -l4014 See plot(3X) for a complete list of device specific plotting libraries. SEE ALSO
plot(5), plot(1G), plot(3X), graph(1G) 4.3 Berkeley Distribution April 30, 1986 PLOT(3F)