Adding to textutils/coreutils

[Stefan Klinger]

Hi there!

I've just written a tiny programme that is hardly worth a own package. However, 
I think it could be part of the textutils package (now coreutils).

'dlc Distinct Line Count' counts the number of occurrences of each distinct 
line of input. Some examples are given below.

Is it possible to add this tool to the original GNU coreutils package?

Available C source code is
  http://www.stefan-klinger.de/files/dlc.tar.bz2



Examples:


1. Basic Operation:

  address@hidden:~> dlc
  foo
  bar
  foo
  foo
  bar
  qux
  ^D
         1 qux
         3 foo
         2 bar

Because the line 'foo' appeared three times, 'bar' twice and 'qux' once.



2. Practical Example

  address@hidden:/home/sk# grep "\[[[:digit:]]*\]:" /var/log/messages \
  > | sed 's/[^[]* \([^ ]*\)\[.*/\1/g' \
  > | dlc \
  > | sort -r -n -k 1,1;
      2895 chat
      1765 pppd
         5 diald
         1 lpd
    
Reports which programmes created how many entries in /var/log/messages.



3. Fast Counting of Unique Lines
  
  address@hidden:~> cat foo | dlc | wc -l
      172
  address@hidden:~> cat foo | sort | uniq | wc -l
      172
  
are equivalent, but the dlc variant is much faster.



Interested? Available C source code is
  http://www.stefan-klinger.de/files/dlc.tar.bz2
  
Questions or suggestion? Please send me an email ;)


Regards,
Stefan


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