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Top Forums Shell Programming and Scripting Checking for substring in a loop takes too long to complete. Post 303039765 by mohtashims on Tuesday 15th of October 2019 02:38:06 AM
Old 10-15-2019
Checking for substring in a loop takes too long to complete.

I need to check if the files returned by ls command in the below script is a sub-string of the argument passed to the script i.e $1

The below script works fine but is too slow.

If the ls command take 12 secs to complete printing all files with while loop then; using posix substring check with grep -q in the script increases the total time to about 140 seconds.

Code:
ls -d "/app/scripts"/* | while read LINE
do
echo "File is:$LINE"
        if echo $1 | grep -q "$LINE"
        then
                echo "Match Found for File:$LINE"
        else
                echo "No Match Found"
        fi
done

If there a way to optimize the script for quicker results ?

Last edited by mohtashims; 10-15-2019 at 03:53 AM..
 

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LOCALE_GET_DISPLAY_SCRIPT(3)						 1					      LOCALE_GET_DISPLAY_SCRIPT(3)

Locale::getDisplayScript - Returns an appropriately localized display name for script of the input locale

	Object oriented style

SYNOPSIS
publicstatic string Locale::getDisplayScript (string $locale, [string $in_locale]) DESCRIPTION
Procedural style string locale_get_display_script (string $locale, [string $in_locale]) Returns an appropriately localized display name for script of the input locale. If is NULL then the default locale is used. PARAMETERS
o $locale - The locale to return a display script for o $in_locale - Optional format locale to use to display the script name RETURN VALUES
Display name of the script for the $locale in the format appropriate for $in_locale. EXAMPLES
Example #1 locale_get_display_script(3) example <?php echo locale_get_display_script('sl-Latn-IT-nedis', 'en'); echo "; "; echo locale_get_display_script('sl-Latn-IT-nedis', 'fr'); echo "; "; echo locale_get_display_script('sl-Latn-IT-nedis', 'de'); ?> Example #2 OO example <?php echo Locale::getDisplayScript('sl-Latn-IT-nedis', 'en'); echo "; "; echo Locale::getDisplayScript('sl-Latn-IT-nedis', 'fr'); echo "; "; echo Locale::getDisplayScript('sl-Latn-IT-nedis', 'de'); ?> The above example will output: Latin; latin; Lateinisch SEE ALSO
locale_get_display_name(3), locale_get_display_language(3), locale_get_display_region(3), locale_get_display_variant(3). PHP Documentation Group LOCALE_GET_DISPLAY_SCRIPT(3)
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