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Top Forums Shell Programming and Scripting [bash] passing array to function Post 302364604 by cfajohnson on Friday 23rd of October 2009 01:38:59 PM
Old 10-23-2009
Quote:
Originally Posted by ASGR
Thanks for your reply.

Unfortunately, the outcome seems to be the same
transposed array that I was trying to avoid.

What "transposed array"?

The function I posted (as fixed below) copies an array to a different name; there is no change to any part of the array.
Quote:

I would have thought it would have worked as it's
the same method used to return an array from the
'load' function which works as expected. However,
the array being returned from the 'load' function isn't
a passed variable and is not reassigned.

What "load function"?
Quote:
The problem seems to specifically originate from the
assignment of an array to array regardless of
method used to assign them, as it would seem.

What problem?
Quote:
An article did describe the reassignment of arrays
and that it does automatically strips white space from
an array which I find is a bad policy enforcing limitations
on the coder.

The reassignment of an array (as done in the function I posted) doesn't strip anything.

CORRECTION: OOPS! Yes it does; the function should have read:
Code:
array_assign()
{
  eval "$1=( \"\${$2[@]}\" )"
}

Quote:

The alternatives that I've also tried are:
function pointers,
referenced variables i.e. ${!ARRAY},
changing the IFS variable to '' ,

and the alternatives that I'm considering:
regex to reconstruct the lines of the array
by using an end of line character,
and global variables (last resort).

The passing of an array to a function is the foundation
of my library, any solution would ideally fit to as fewer
lines as possible as it's repeated throughout every function,
unless I can reuse the 'array_assign' function within another
function with it executing correctly.

Any further suggestions would again be appreciated.

On further investigation, the function above will work in bash 3.0 and later. Empty elements will be stripped in earlier versions of bash.

Last edited by cfajohnson; 10-23-2009 at 03:03 PM.. Reason: Fix function
 

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