Dependent Origination

grep example

Posted on: August 3, 2011

i have always felt grep’s regular expression pattern a bit different than expectation.

here is an example:

the line format i am looking for is “number/number\tstuff\tstuff\etc”

I used ‘[0-9]+/[0-9]+’ to search through all the lines for the above format, to no avail. It found nothing.

Out of desperation, I tried ‘[0-9]/[0-9]’ as the pattern on command line and grep is returning all the lines — it is not returning all the lines with a single digit number as i was thinking at all.

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

August 2011
M T W T F S S
« Jul   Sep »
1234567
891011121314
15161718192021
22232425262728
293031  

Twitter

Flickr Photos

%d bloggers like this: