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Full Discussion: How to substitute brackets in the beginning of string in perl?
Top Forums Shell Programming and Scripting How to substitute brackets in the beginning of string in perl? Post 302345737 by vanitham on Thursday 20th of August 2009 05:42:58 AM
Old 08-20-2009
How to substitute brackets in the beginning of string in perl?
Hi,

I have a string like this user can specify different query sets that is why "or" is mentioned:

Code:
$string="[[:<:]](";

or

$string="[[:<:]]((";

or

$string="[[:<:]](((";

or

$string="[[:>:]](((((";


What i have to do is substitute these brackets in the beginning.

I tried like this:

Code:
if($string=~/\[\[:<:\]\]\(/)
{
  $string=~s/\[\[:<:\]\]\(/\(\[\[:<:\]\]/g;
}
elsif($string=~/[[:<:]]\(\(/)
{
   #same here
}
elsif($string=~/[[:<:]]\(\(\(/)
{
  #same here
}
elsif($string=~/[[:<:]]\(\(\(\(/)
{
  #same here
}
elsif($string=~/[[:<:]]\(\(\(\(\(/)
{
  #same here
}

If statement i can use but i will be not be sure how many brackets will be there to substitute in the beginning?

I have to avoid this if loop!!

The output should be like this.

Code:
$string="\([[:<:]]";

or

$string="\(\([[:<:]]";

or

$string="\(\(\([[:<:]]";

etc like this all these different string examples are based on the users query sets that is why i just mentioned or such that user can give either like first string ( [[:<:]]\( ) or like second string ( [[:<:]]\(\( ).

How can i put or substitute brackets in the beginning of the sting?

Any ideas???

Regards
Vanitha
 

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LEARN ABOUT OSX

mdfind

mdfind(1)						    BSD General Commands Manual 						 mdfind(1)

NAME

     mdfind -- finds files matching a given query

SYNOPSIS

     mdfind [-live] [-count] [-onlyin directory] [-name fileName] query

DESCRIPTION

     The mdfind command consults the central metadata store and returns a list of files that match the given metadata query. The query can be a
     string or a query expression.

     The following options are available:

     -0 	 Prints an ASCII NUL character after each result path.	This is useful when used in conjunction with xargs -0.

     -live	 Causes the mdfind command to provide live-updates to the number of files matching the query.  When an update causes the query
		 results to change the number of matches is updated.  The find can be cancelled by typing ctrl-C.

     -count	 Causes the mdfind command to output the total number of matches, instead of the path to the matching items.

     -onlyin dir
		 Limit the scope of the search to the directory specified.

     -name fileName
		 Searches for matching file names only.

     -literal	 Force the provided query string to be taken as a literal query string, without interpretation.

     -interpret  Force the provided query string to be interpreted as if the user had typed the string into the Spotlight menu.  For example, the
		 string "search" would produce the following query string:
		       (* = search* cdw || kMDItemTextContent = search* cdw)

EXAMPLES

     The following examples are shown as given to the shell.

     This returns all files with any metadata attribute value matching the string "image":

	   mdfind image

     This returns all files that contain "MyFavoriteAuthor" in the kMDItemAuthor metadata attribute:

	   mdfind "kMDItemAuthor == '*MyFavoriteAuthor*'"

     This returns all files with any metadata attribute value matching the string "skateboard".  The find continues to run after gathering the
     initial results, providing a count of the number of files that match the query.

	   mdfind -live skateboard

     To get a list of the available attributes for use in constructing queries, see mdimport(1), particularly the -X switch.

SEE ALSO

     mdimport(1), mdls(1), mdutil(1), xargs(1)

Mac OS X							   June 10, 2004							  Mac OS X
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