Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>As far as I can tell, it doesn't. With GNU grep versions 2.5.3, 2.6.3, 2.10, and 2.12, I get:</p> <pre><code>$ echo "ABC ddd kkk DDD" | grep -Eo "[A-Z]+" ABC DDD $ echo "ABC ddd kkk DDD" | grep -Eo "[A-Z]*" ABC DDD </code></pre> <p>Please double-check your second example. If you can confirm that you get only one line of output, it might be a bug in your <code>grep</code>. If you're using GNU <code>grep</code>, what's the output of <code>grep --version</code>? If not, what OS are you using, and (if you know) what <code>grep</code> implementation?</p> <p><strong>UPDATE :</strong></p> <p>I just built and installed GNU grep 2.5.1 (the version you're using) from source, and I confirm your output. It appears to be a bug in that version of <code>grep</code>, apparently corrected between 2.5.1a and 2.5.3. GNU grep 2.5.1 is about 12 years old; can you install a newer version? Looking through the <code>ChangeLog</code> for 2.5.3, I suspect this may have been the fix:</p> <pre><code>2005-08-24 Charles Levert &lt;charles_levert@gna.org&gt; * src/grep.c (print_line_middle): In case of an empty match, make minimal progress and continue instead of aborting process of the remainder of the line, in case there's still an upcoming non-empty match. * tests/foad1.sh: Add two tests for this. * doc/grep.texi, doc/grep.1: Document this behavior, since --only-matching and --color are GNU extensions which are otherwise unspecified by POSIX or other standards. </code></pre> <p>Even if you don't have full access on the machine you're using, you should still be able to download the source tarball from <code>ftp://ftp.gnu.org/gnu/grep/</code> and install it under your home directory (assuming your system has a working compiler and associated tools).</p>
    singulars
    1. This table or related slice is empty.
    1. POregex: plus sign vs asterisk
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USKeith Thompson
    1. USKeith Thompson
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POregex: plus sign vs asterisk
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTAcceptedByOriginator
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COI cannot install anything because it is not my machine, but thanks for confirming and letting me know. So it wasn't a knowledge problem after all but a bug. Thanks!
      singulars
      1. PO
      1. USPaolo
    2. CO@Paolo: You should be able to install it from source under your home directory. See my updated answer.
      singulars
      1. PO
      1. USKeith Thompson
    3. COHey Keith. I tried installing it under my home directory but I recieved many errors about permissions. test -z "/usr/local/share/info" || /bin/mkdir -p "/usr/local/share/info" /usr/bin/install -c -m 644 ./grep.info '/usr/local/share/info' /usr/bin/install: cannot create regular file `/usr/local/share/info/grep.info': Permission denied make[2]: *** [install-info-am] Error 1 make[2]: Leaving directory `/home/pco/grep/grep-2.9/doc' make[1]: *** [install-am] Error 2 make[1]: Leaving directory `/home/pco/grep/grep-2.9/doc'
      singulars
      1. PO
      1. USPaolo
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload