Hello, I will like to delete/replace $3 with NaN. condition $3>-2000 (file1.dat) to produce out.dat. I want to retain the structure of the table. I use this code, this output only $3. Any idea on how to modify this code. Thank you.
Hi
I have 2 csv files which looks like the following and i have to compare the 2 CSVs and create a third file such that if the value of the 1st cell in A.CSV and the value of the first cell in the B.CSV are same, it should print "SAME" in the third file or else print NOT SAME. Likewise i need... (19 Replies)
Hello. I'm trying to delete the lines of a file does not contain the letter "T " (for example) at position 26.
So far, I could only print the result:
awk '{if (substr ($ 1,1,26)! ~ / T /) print}' file.txt
How I can do to eliminate the lines that meet this condition?
Help please. ... (4 Replies)
How do you delete cells from a space delimited text file given row and column number? Letś say the row number is r and the column number is c. Thanks! (5 Replies)
I have a directory containing thousands of items “video files”, these items were generated by an application, which generates two items with the same name but with different extensions “.avi and .mp4”. There was a tool in my application to remove one item @ a time. Later I found this tool removes... (5 Replies)
Hi Friends,
I have the following file,
cat input
chr1 1000 2000
chr1 600 699
chr1 701 1000
chr1 600 1710
chr2 900 1800
Now, I would like to see the difference of
Record1.Col2 - Record2.Col2
Record1.Col2 - Record2.Col3
Record1.Col3 - Record2.Col2
Record1.Col3 - Record2.Col3
... (1 Reply)
i have a table like this:
id, senderNumber, blacklist
-----------------------------
1 0835636326 Y
2 0373562343 Y
3 0273646833 Y
and I want to delete automatically if a new inserted row on another table consist anything on senderNumber column above using a BASH Script
I... (9 Replies)
I have file input
a,b,b,b,ee,b3012dasda,53012,203,1,END,START
b,c,b,b,ee,sdasdad,57483,203,,END,START
a,b,b,b,ee,b3012dasda,53012,203,,END,START
b,c,b,b,ee,sdasdad,57483,203,1,END,START
I want every ",," in $9 replace with ,0,
the output should be
... (3 Replies)
Hello,
I have a directory with many files whose creation time is distributed all over the day.
I need ANY 20 files per hour. So, I need
20 files for hour 00
20 files for hour 01
...
20 files for hour 23
What I have done so far is not great. Here is the code:
# get the Month
a=`echo... (8 Replies)
Gents,
Please can you help me.
In the range 4-24 column the values are duplicate some times and I will like to delete the fist occurrence and keep the last only. The file is not sorted and I can sorted because from column 75 to the end the file is increase by time..
I have a file like this... (10 Replies)
Hi,
I have a file like below
PRUM,67016800 ,CC ,C1,67016800 , ,Y,Y,2 ,CK,BX,FOX ,00000001,EA,00000001,20141120 00:00:00, ,N,Y,Y,CK ABCDEF... (7 Replies)
Discussion started by: mady135
7 Replies
LEARN ABOUT SUSE
io::atomicfile
IO::AtomicFile(3) User Contributed Perl Documentation IO::AtomicFile(3)NAME
IO::AtomicFile - write a file which is updated atomically
SYNOPSIS
use IO::AtomicFile;
### Write a temp file, and have it install itself when closed:
my $FH = IO::AtomicFile->open("bar.dat", "w");
print $FH "Hello!
";
$FH->close || die "couldn't install atomic file: $!";
### Write a temp file, but delete it before it gets installed:
my $FH = IO::AtomicFile->open("bar.dat", "w");
print $FH "Hello!
";
$FH->delete;
### Write a temp file, but neither install it nor delete it:
my $FH = IO::AtomicFile->open("bar.dat", "w");
print $FH "Hello!
";
$FH->detach;
DESCRIPTION
This module is intended for people who need to update files reliably in the face of unexpected program termination.
For example, you generally don't want to be halfway in the middle of writing /etc/passwd and have your program terminate! Even the act of
writing a single scalar to a filehandle is not atomic.
But this module gives you true atomic updates, via rename(). When you open a file /foo/bar.dat via this module, you are actually opening a
temporary file /foo/bar.dat..TMP, and writing your output there. The act of closing this file (either explicitly via close(), or
implicitly via the destruction of the object) will cause rename() to be called... therefore, from the point of view of the outside world,
the file's contents are updated in a single time quantum.
To ensure that problems do not go undetected, the "close" method done by the destructor will raise a fatal exception if the rename() fails.
The explicit close() just returns undef.
You can also decide at any point to trash the file you've been building.
AUTHOR
Primary Maintainer
David F. Skoll (dfs@roaringpenguin.com).
Original Author
Eryq (eryq@zeegee.com). President, ZeeGee Software Inc (http://www.zeegee.com).
REVISION
$Revision: 1.2 $
perl v5.12.1 2005-02-10 IO::AtomicFile(3)