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Top Forums UNIX for Dummies Questions & Answers Listing numeric strings alone Post 302542910 by pandeesh on Friday 29th of July 2011 02:43:19 AM
Old 07-29-2011
Java Listing numeric strings alone

i have a file called 'test.txt' which contains the below data.

abc123
123445
123abc
23224q

From the above data, i want to display the line which contains only numeric [0-9]. So i have tried the below commands with sed

Code:
sed -n '/^[0-9]$/p' test.txt
 
sed '/^[0-9]$/!d' test.txt

But it doesn't work as expected.
Please help me to achieve this

thanks

Last edited by pludi; 07-29-2011 at 04:03 AM..
 

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STREAM_FILTER_REMOVE(3) 						 1						   STREAM_FILTER_REMOVE(3)

stream_filter_remove - Remove a filter from a stream

SYNOPSIS
bool stream_filter_remove (resource $stream_filter) DESCRIPTION
Removes a stream filter previously added to a stream with stream_filter_prepend(3) or stream_filter_append(3). Any data remaining in the filter's internal buffer will be flushed through to the next filter before removing it. PARAMETERS
o $stream_filter - The stream filter to be removed. RETURN VALUES
Returns TRUE on success or FALSE on failure. EXAMPLES
Example #1 Dynamicly refiltering a stream <?php /* Open a test file for reading and writing */ $fp = fopen("test.txt", "rw"); $rot13_filter = stream_filter_append($fp, "string.rot13", STREAM_FILTER_WRITE); fwrite($fp, "This is "); stream_filter_remove($rot13_filter); fwrite($fp, "a test "); rewind($fp); fpassthru($fp); fclose($fp); ?> The above example will output: Guvf vf a test SEE ALSO
stream_filter_register(3), stream_filter_append(3), stream_filter_prepend(3). PHP Documentation Group STREAM_FILTER_REMOVE(3)
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