03-01-2005
Now it works perfect!
Beautiful solution !
Best regards,
Nir
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I have a 30 column tab delimited record file. I need to extract the first 10column. The following command to cut was not working
cut -f 1-10 -d "\t" filename.
Could any one keep on this .
Thanks in Advance (4 Replies)
Discussion started by: vinod.thayil
4 Replies
2. Shell Programming and Scripting
Dear Friends,
Here I have two queries.
1. Want to make folder named as last three characters of a file name (length of file name can vary file to file)
E.g File name is AAAACCCCBBBB.txt (12 Characters excluding file extension) then folder to be created is BBB
Irrespective of... (7 Replies)
Discussion started by: anushree.a
7 Replies
3. Shell Programming and Scripting
First I have to say thank you to this community and this forum. You helped me very much builing several useful scripts.
Now, I can't get a solution the following problem, I'm stuck somehow. Maybe someone has an idea.
In short, I dump a site via lynx and pipe the output in a file. I need to... (7 Replies)
Discussion started by: lowmaster
7 Replies
4. Shell Programming and Scripting
Hi,
I have a file named Mani.txt. The contents are like this
cat Mani.txt
--------------------------------------------------------
Hi there how r u
My Name is Mani
Bye
------------------------------------------------------------
I want to cut the first and last lines from the file... (15 Replies)
Discussion started by: pathanjalireddy
15 Replies
5. Shell Programming and Scripting
testfile.csv
0","1125209",,"689202CBx18888",,"49",,,"NONMC",,,,,"01112010",,,,,,,"MTM-
"1","",,"689202ABx19005",,"49",,,"NONMC",,,,,"01072010",,,,,,,"MTM-
testfile.csv looks like above format
if the second column is null then get 23rd column and store in a different varible .. add all the... (1 Reply)
Discussion started by: mgant
1 Replies
6. Shell Programming and Scripting
Hi,
how do I go about cutting out the first numeric characters after the word "access"?
access1005101228.merged-00.15.17.86.d8.b8.log.gz (16 Replies)
Discussion started by: GermanJulian
16 Replies
7. Shell Programming and Scripting
Dear Friends,
I want to take last 10 characters of a file name in a variable.
E.g.
file name is
123432311234567890.txt
then we want "1234567890" to be taken in an variable.
Request you to guide me to do the same
Thanks in anticipation
Anushree (7 Replies)
Discussion started by: anushree.a
7 Replies
8. Shell Programming and Scripting
Hi, i have a file containing nrows and 3cols. i want to cut it in specific length and save output to individual files.
1 2 3
4 5 6
5 8 9
10 11 12
13 14 15
16 17 18
i need to cut the file say every 2 rows and save it in individual file.
01.dat contains
1 2 3
4 5 6
02.dat
7 8 9... (10 Replies)
Discussion started by: ida1215
10 Replies
9. Shell Programming and Scripting
hi gurus,
I want to cut a selected pattern from the source file
For example
<operation >
Update
Update
Update
<operation>
I want to select the three lines having update and the one above <operation> to be cut from source file and paste it to another
As of now i... (2 Replies)
Discussion started by: r_t_1601
2 Replies
10. UNIX for Dummies Questions & Answers
I am trying to remove columns 81-97 from a line that can be as long as 114 characters. Because a number of lines might not have under 80 characters, using the cut command following by paste could be a problem. While sed might work, is there some other utility that could do this more easily?
... (9 Replies)
Discussion started by: wbport
9 Replies
LEARN ABOUT NETBSD
nbperf
NBPERF(1) BSD General Commands Manual NBPERF(1)
NAME
nbperf -- compute a perfect hash function
SYNOPSIS
nbperf [-ps] [-a algorithm] [-c utilisation] [-h hash] [-i iterations] [-m map-file] [-n name] [-o output] [input]
DESCRIPTION
nbperf reads a number of keys one per line from standard input or input. It computes a minimal perfect hash function and writes it to stdout
or output. The default algorithm is "chm".
The -m argument instructs nbperf to write the resulting key mapping to map-file. Each line gives the result of the hash function for the
corresponding input key.
The parameter utilisation determines the space efficiency.
Supported arguments for -a:
chm This results in an order preserving minimal perfect hash function. The utilisation must be at least 2, the default. The number of
iterations needed grows if the utilisation is very near to 2.
chm3
Similar to chm. The resulting hash function needs three instead of two table lookups when compared to chm. The utilisation must be at
least 1.24, the default. This makes the output for chm3 noticable smaller than the output for chm.
bpz This results in a non-order preserving minimal perfect hash function. Output size is approximately 2.79 bit per key for the default
value of utilisation, 1.24. This is also the smallest supported value.
Supported arguments for -h:
mi_vector_hash Platform-independent version of Jenkins parallel hash. See mi_vector_hash(3).
The number of iterations can be limited with -i. nbperf outputs a function matching uint32_t hash(const void * restrict, size_t) to stdout.
The function expects the key length as second argument, for strings not including the terminating NUL. It is the responsibility of the call-
er to pass in only valid keys or compare the resulting index to the key. The function name can be changed using -n name. If the -s flag is
specified, it will be static.
After each failing iteration, a dot is written to stderr.
nbperf checks for duplicate keys on the first iteration that passed basic hash distribution tests. In that case, an error message is printed
and the program terminates.
If the -p flag is specified, the hash function is seeded in a stable way. This may take longer than the normal random seed, but ensures that
the output is the same for repeated invocations as long as the input is constant.
EXIT STATUS
The nbperf utility exits 0 on success, and >0 if an error occurs.
SEE ALSO
mi_vector_hash(3)
AUTHORS
Jorg Sonnenberger
BSD
September 25, 2012 BSD