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Posted by revtopo (revtopo), 22 June 2007
hi every one,

in the code am writing i have to check a file ids that are in an array.
my code is:

@accession_id = grep/\@array/ , topo_ids.srs;

it showed no error. but can't get the @accession_id printed.

@arrays contain list of ids that i have to look for in topo_ids.srs. Should I have to add 'g' to make that global

Posted by admin (Graham Ellis), 22 June 2007
If you want to match all the elements in a list via a regular expression, you need to make up an appropriate regulare expression.  Hard to explain so I'll give you an example:

@indeed = ("cat","dog","bunny");
@source = (
  "We have a cat\n",
  "My son has cows in his garden\n",
  "My daughter had a hamster\n",
  "Hugh has a bunny at his place\n");
# Make up the regular expression to look for
$filter = join('|',@indeed);
@matched = grep(/$filter/,@source);
print @matched;

Which runs:
earth-wind-and-fire:~/jun07/ox grahamellis$ perl hte
We have a cat
Hugh has a bunny at his place

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