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Top Forums Shell Programming and Scripting sed - print only matching regex Post 302315026 by domi55 on Monday 11th of May 2009 09:51:11 AM
Old 05-11-2009
sed - print only matching regex

Hi folks,

Lets say I have the following text file:

Code:
name, lastname, 1234, name.lastname@test.com
name1, lastname1, name2.lastname2@test.com, 2345
name, 3456, lastname, name3.lastname3@test.com
4567, name, lastname, name4.lastname4@test.com

I now need the following output:

Code:
1234
2345
3456
4567

Is 'sed' the right way? If yes: How can I print out just the matching regex?

Code:
sed -n '/[0-9]{4}/p'

 

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IMPLODE(3)								 1								IMPLODE(3)

implode - Join array elements with a string

SYNOPSIS
string implode (string $glue, array $pieces) DESCRIPTION
string implode (array $pieces) Join array elements with a $glue string. Note implode(3) can, for historical reasons, accept its parameters in either order. For consistency with explode(3), however, it may be less confusing to use the documented order of arguments. PARAMETERS
o $glue - Defaults to an empty string. o $pieces - The array of strings to implode. RETURN VALUES
Returns a string containing a string representation of all the array elements in the same order, with the glue string between each ele- ment. EXAMPLES
Example #1 implode(3) example <?php $array = array('lastname', 'email', 'phone'); $comma_separated = implode(",", $array); echo $comma_separated; // lastname,email,phone // Empty string when using an empty array: var_dump(implode('hello', array())); // string(0) "" ?> NOTES
Note This function is binary-safe. SEE ALSO
explode(3), preg_split(3), http_build_query(3). PHP Documentation Group IMPLODE(3)
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