06-09-2008
Thanks a lot for taking the time to explain all this radoulov ^^ that's really great !
Quote:
I think the sort command will cast it correctly. Do you have an example where the input like this is not sorted correctly?
well not in that particular case but i remember having to strip the ';' to be able to use 'sort -n' correctly (without specifying a key, i just extract last field with awk then apply sort -n to it. A shame 'sort' doesn't allow reverse key selection), for example with values like :
27384;
7384; or 384;
but I tried so many different things, I guess this should be a remain of some mistypes/mistakes on my side or because of the Windows line endings some files seems to have (some files are created on Windows and some on Unix) ?
No the last field is not fixed because I'm on a bash script utility for sql queries files sorting/updating, this have to be used on several different files where the number of fields is not always the same and where the key value can be, rarely but happens, in the middle of the line.
So in this case taking a $key arguments from cli:
awk 'END{for(k in _)print _[k]}{_[$'"$key"']=$0}' $file1 $file2 > $file1.updated
with an additionnal conditional on argument '0' for the end of the line (because I didn't get $key to turn into NF and awk taking '"$key"').
I'm making it for a small community and it has to be really simple.
If you're not afraid to read awfull code I can post it ^^
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
I have a log file which is continuously added to, called log.file. I'd like to
monitor this file, and when certain lines are found, update some totals in
another file. I've played around with tail -f, grep, and awk, but can't seem
to hit the right note, so to speak.
The lines I'm... (0 Replies)
Discussion started by: nortonloaf
0 Replies
2. UNIX for Dummies Questions & Answers
Hi,
I have two text files containing records in following format:
file1 format is:
name1 age1 nickname1 path1
name2 age2 nickname2 path2
file 1 example is:
abcd 13 abcd.13 /home/temp/abcd.13
efgh 15 efgh.15 /home/temp/new/efgh.15 (4 Replies)
Discussion started by: alrinno
4 Replies
3. UNIX for Dummies Questions & Answers
Can someone help me again, I think with awk? I have a file with 4 columns (pipe-delimited):
I just want to convert the last field so that e1 is now 'message 1', e2 is 'message 2', e0 is 'message 3', etc. I don't want to change any other columns because the e0-e10 code may appear as part of a... (4 Replies)
Discussion started by: giannicello
4 Replies
4. Shell Programming and Scripting
I have an extremely large csv file that I need to search the second field, and upon matches update the last field...
I can pull the line with awk.. but apparently you cant use awk to directly update the file? So im curious if I can use sed to do this... The good news is the field I want to... (5 Replies)
Discussion started by: trey85stang
5 Replies
5. Shell Programming and Scripting
I have a file ("modtest") in which I want to update the last date/time block in the lines beginning with a period. Here is a sample:
.ROMULT 10150908EDT 10270908EDT 10010908EDT RANGE
RAWV2 1.00
.ROMULT 10150908EDT 10270908EDT 10010908EDT FGROUP
CHOWANRV 1.00
.RRIMULT 10150908EDT... (10 Replies)
Discussion started by: chrismcg24
10 Replies
6. Shell Programming and Scripting
file1: (unique files)
1 /pub/atomicbk/catalog/catalog.gif 693
2 /pub/atomicbk/catalog/home.gif 813
3 /pub/atomicbk/catalog/logo2.gif 12871
4 /pub/atomicbk/catalog/sleazbk.html 18338
file2: (duplicate filenames allowed)
28/Aug/1995:00:00:38 1 /pub/atomicbk/catalog/home.gif 813... (2 Replies)
Discussion started by: jontjioe
2 Replies
7. Shell Programming and Scripting
I have another question I am stuck at :wall:
I have a text file with two columns, like so...
2 0.0627279
3 0.0794451
4 0.108705
5 0.137739
6 0.190394
7 0.217407
8 0.241764
9 0.344458
10 0.460762
I'd like to go through the file line by line until the value in the second column... (3 Replies)
Discussion started by: origamisven
3 Replies
8. Shell Programming and Scripting
I can not seem to figure out how to update the attached match.txt column 2 using update.txt. However, only the text before the period in updat.txt appears in match.txt.
For example, in update.txt NM_001613.2 matches NM_001613 in match.txt, so is it possible to update the record in match.txt to... (8 Replies)
Discussion started by: cmccabe
8 Replies
9. Shell Programming and Scripting
Hi,
I have a file(testfile.txt) that contains list of variables as shown below. T
$$FirstName=James
$$LastName=Fox
$$Dateofbirth=1980-02-04
……and so on there are 50 different variables.
I am writing a script(script1.sh) that will update the above three variable one by one with the values... (6 Replies)
Discussion started by: Saanvi1
6 Replies
10. UNIX for Beginners Questions & Answers
hi,
i have an csv(which is a month's log file containing userid and log in date ) file which has to be appended to another file say master.log.I need to compare the next month's log data to master.log file .In case, there is new log date for userid it has to get updated in master.log file or i... (2 Replies)
Discussion started by: preema
2 Replies
JOIN(1) BSD General Commands Manual JOIN(1)
NAME
join -- relational database operator
SYNOPSIS
join [-a file_number | -v file_number] [-e string] [-o list] [-t char] [-1 field] [-2 field] file1 file2
DESCRIPTION
The join utility performs an ``equality join'' on the specified files and writes the result to the standard output. The ``join field'' is
the field in each file by which the files are compared. The first field in each line is used by default. There is one line in the output
for each pair of lines in file1 and file2 which have identical join fields. Each output line consists of the join field, the remaining
fields from file1 and then the remaining fields from file2.
The default field separators are tab and space characters. In this case, multiple tabs and spaces count as a single field separator, and
leading tabs and spaces are ignored. The default output field separator is a single space character.
Many of the options use file and field numbers. Both file numbers and field numbers are 1 based, i.e., the first file on the command line is
file number 1 and the first field is field number 1. The following options are available:
-a file_number
In addition to the default output, produce a line for each unpairable line in file file_number.
-e string
Replace empty output fields with string.
-o list
The -o option specifies the fields that will be output from each file for each line with matching join fields. Each element of list
has either the form file_number.field, where file_number is a file number and field is a field number, or the form '0' (zero), repre-
senting the join field. The elements of list must be either comma (',') or whitespace separated. (The latter requires quoting to
protect it from the shell, or, a simpler approach is to use multiple -o options.)
-t char
Use character char as a field delimiter for both input and output. Every occurrence of char in a line is significant.
-v file_number
Do not display the default output, but display a line for each unpairable line in file file_number. The options -v 1 and -v 2 may be
specified at the same time.
-1 field
Join on the field'th field of file1.
-2 field
Join on the field'th field of file2.
When the default field delimiter characters are used, the files to be joined should be ordered in the collating sequence of sort(1), using
the -b option, on the fields on which they are to be joined, otherwise join may not report all field matches. When the field delimiter char-
acters are specified by the -t option, the collating sequence should be the same as sort(1) without the -b option.
If one of the arguments file1 or file2 is '-', the standard input is used.
EXIT STATUS
The join utility exits 0 on success, and >0 if an error occurs.
COMPATIBILITY
For compatibility with historic versions of join, the following options are available:
-a In addition to the default output, produce a line for each unpairable line in both file1 and file2.
-j1 field
Join on the field'th field of file1.
-j2 field
Join on the field'th field of file2.
-j field
Join on the field'th field of both file1 and file2.
-o list ...
Historical implementations of join permitted multiple arguments to the -o option. These arguments were of the form
file_number.field_number as described for the current -o option. This has obvious difficulties in the presence of files named 1.2.
These options are available only so historic shell scripts do not require modification and should not be used.
SEE ALSO
awk(1), comm(1), paste(1), sort(1), uniq(1)
STANDARDS
The join command conforms to IEEE Std 1003.1-2001 (``POSIX.1'').
BSD
July 5, 2004 BSD