Programming :: Erase First Line Of A Csv File?
Feb 5, 2009i am trying to do it with sid but its deleting the line instead of erasing it.
my code is
sed '1d' file > file2
ADVERTISEMENT
Programming :: Access A File Line By Line, And Check The Length Of Each Line.
Feb 13, 2011I want to access a file, and check the length of every line.After, i want to check and replace all lines with length over 10 characters, with a message.Does anyone have a clue on that?
View 1 Replies View RelatedProgramming :: Create File Listing In C++ That Will Generate Line Number On Every Line Of Code
Apr 11, 2010I have a project due for my Intro to C++ class and we are suppose to generate a file listing that will take an input of a C++ source code with .cpp extension and make a copy of it with a .lst extention that will have a line number preceding each and every line.
View 12 Replies View RelatedProgramming :: Adding Line From File1 Into A Line Of Another File Based On Maching IDs
Jan 3, 2011I wish to add information to one of my files based on matching IDs,
Here is an example
(the id is the 3 colunm)
(the ID is the 2 colunm)
And the output i wish to be
OUTPUT:
So as you can see the ones that do not match are still present, and the ones that do match just have the extra information from file2.txt added to them.
I thought about using join but that only seems to join the ones that match displays thoes only. i would like all the information in the output file.
Programming :: Open Two Text Files - Read Them Line By Line And Update Parameters Of The 3rd File ?
Oct 18, 2010I have two txt files containing x and y coordinates: xcoord.txt & ycoord.txt. I need to open them; read them line by line to get each coordinate; then each time I need to update Xs and Ys parameters inside another file called "dc.in" with the grabbed values.
Finally each time I need to run two exe files ( dc_2002 and st_vac) and produce corresponding output for each Xs and Ys ( dc.in is an input file for this exe files)
I have written the following code but it does not work:
Programming :: Perl - Delete Line From Text File With Duplicate Match At Beginning Of Line
Apr 1, 2009Was wondering if any perl guru's could help me with a quick log file adjustment. I have a text file that looks like so (tabs and newlines are revealed so you can see what separates the data):
There are maybe 100 lines of text in this file at any given time. I need to delete all duplicate lines only looking at the first bit of text prior to the first tab. It doesn't matter which one gets deleted as long as there are no two lines that begin with that same text at the beginning before the first tab. So in this example, either the fist line "1234" or the last line "1234" would need to be deleted. I already have code in my script that opens the files - I just need the code to read the text into an array and the part that would find matches based on the above criteria, and make the deletions.
If it would be easier, I can even do a system call and use SED (v4.1.5) and/or AWK (3.1.5) instead.
Programming :: Bash: Read A Text File Line By Line?
Jul 7, 2011bash 3.1.17(2) I'm trying do write a shell script which must operate on each line of an ASCII text file. So, all the code must be inside a loop, and inside the loop, the first thing should be to read the next line from the file. I have the bash read command. But it reads from stdin. Any way to make read from a file?
View 6 Replies View RelatedProgramming :: C - Copy File Line By Line With Some Slight Changes?
Mar 2, 2010In C, I want to make a program that will take a file and replace it with a file that's nearly the same but with some minor changes. Also, I would like to point out that I'm still fairly much a beginner with C. As for an example of the file, I want to take something like this:
Code:
Random Crap
More Random Crap
Even More
Something That Changes XXXXX
[code]....
I figured the best way to go about doing this was to open the file and a blank file, read the original bit by bit and when it gets to the point that needs to be changed exchange the part that needs to be changed with what it should be changed to, delete the original file, and rename the new one to the correct name. So the first problem I've run into (and I'll probably have more) is that when I'm trying to read stuff from the original file, my program doesn't seem to be finding the original. I'm sure much of my problems will be just from not knowing how to use the C functions so bear with me. Right now I have the following:
Code:
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
[code]...
And when I try to run it I get the following:
Code:
Died Here: No such file or directory
Segmentation fault
Right now the length of 50 was just a random test length. Pretty much I was just trying to get it to read anything from the file. In the end I'm going to want it to read the entire file bit by bit, but at the moment I can't seem to get it to read anything.
Programming :: Error During Reading A File Line By Line In C?
Mar 6, 2010I have a code over there. It reads a line from file and converts contents of it to double.
Code:
/*
* fileRead.c
[code]...
Programming :: QTimer To Read A File Line After Line?
Mar 25, 2010I need a qtimer to trigger reading of a file line by line, I have the code sort of running with the timer trigger but qtimer will just read the first line over and over as it is now.
Here is the code so far:
self.lcdtimer = QTimer()
self.connect(self.pushButton85,SIGNAL("clicked()"),self.update)
self.connect(self.lcdtimer, SIGNAL("timeout()"), self.lcdxyz)
Code:
def lcdxyz(self):
import time
import os
[code]....
Programming :: Programing - Reading File Line By Line Then Char By Char In Each Line
May 29, 2010I've never programed shell scripting.
Code goes like so:
I simply want to read a file "data.txt" line by line Then char by char and add them into a result var. The file is supossed to always contain numeric values
Programming :: Deleting Line By Line From A File?
Apr 21, 2010this script returns me :
sed: -e expression #1, char 2: extra characters after command
sed: -e expression #1, char 2: extra characters after command
Code:
#!/bin/bash
while read line
do
sed -i "$line" 'd' test.txt
done < test.txt
Programming :: Insert A Line/value After A Particular Line In File With Sed?
Jan 13, 2010I need to run a command in a shell script to insert a line in a file, after it finds certain line. To add the line 'user = mysql' after the line [mysqld] in file /etc/my.cnf
View 3 Replies View RelatedProgramming :: How To Read Line By Line In A File In C
Feb 5, 2010i want to read line by line in a files in C language actually my porblem is i have a one file cotains
if iam using fgets, it is reading each time AT only it does not moving to Ok in that file
Programming :: Read File Line By Line?
Mar 23, 2011so I have a script that creates couple of txt files. First file output is something like below..
cn=test,ou=something,ou=some,o=org
cn=testa,ou=something,ou=some,o=org
cn=testb,ou=something,ou=some,o=org
second file output is something like below..
usera
userb
userc
Quote:
userdn=`ldapsearch -x -h $server -LLL "(objectclass=person)" dn | grep dn: | cut -d" " -f2 > userdn.txt
for i in $(cat userdn.txt);do
ldapsearch -h $server -p 389 -x -D $admid -w $admpwd -s one -b "$userdn" dn | grep dn: | cut -d" " -f2 | cut -d"=" -f2 | cut -d"," -f1 > user.txt
for i $(cat user.txt);do
echo "$userdn"
done
done
when I ran both ldapsearch commands invidually, they work fine. But when I ran script, I got first file correctly but not the second one. It looks like its not reading the first file correctly and not setting the variable ($userdn) value correctly in the second ldapseach command. I want read first file first line and run the second ldapsearch and continues, then read the second line..and so on.
Programming :: Add Line To A File ( 3rd Line)?
Apr 6, 2011going back to my earlier post "Last digit minus ONE", when i get a Ip addresse with minus 1 ($ip), i need to add the new Ip address ($ip) to resolv.conf of that system. so from resolve.conf:
Code:
# /etc/resolv.conf .......
domain mydomain.ca
nameserver 11.21.36.98
nameserver 11.21.37.98
[code]...
tried with sed
Code:
sed 'nameserver $ip/domain/G' -f /etc/resolv.conf
but not able to get it.
Programming :: Insert Each Line Of One File To The Another File After Certain Lines?
Jul 2, 2010i have two files with thousands of line, I am trying to combine these two files but i want to insert each line of one file to the another file after certain lines. I am using awk with the following command but it does not work.cat file1 | awk ' { print $0; if (NR%3004==0) {print "file2"}}' > outputfile
View 14 Replies View RelatedProgramming :: Copy And Replacing Specific Line From File1 To File2 Line By Line
Mar 22, 2011I have two files, file1.traj and file2.traj. Both these files contain identical data and the data are arranged in same format in them. The first line of both files is a comment.
At line 7843 of both files there is a cartesian coordinate X, Y and Z ( three digits ). And at line 15685 there is another three digits. The number of lines in between two cartesian coordinates are 7841. And there are few hundreds of thousands of lines in a file.
What I need to do is copy the X Y Z coordinate (three digits) from file1.traj at line 7843 and paste into file2.traj at the same line number as in file1.traj. The next line will be 15685 from file1.traj and replace at line 15685 at file2.traj. And I dont want other lines (data) in file2.traj get altered. This sequence shall be going on until the end of the file. Means copy and substitude the selected lines from file1.traj into file2.traj.
I tried to use paste command but I cant do for specified line alone.
Here i showed the data format in the file. I used the line number for clarity purpose.
Code:
Programming :: Gawk - Delete Line In File?
Oct 13, 2010I want to delete lines which contain the word "Fehler" but for some reason my programm isn't working:
Code: BEGIN { FS="|"
OFS="|"
SUBSEP="|"
[code]...
Programming :: Read A Line From A Txt File In A Script?
Dec 9, 2010have been playing around with a script for a few hours and now I need to be able to output the lines in a text file one by one to be used later in the script.What it gonna do is to read a log file and grep the usernames, then write them to a file, and then run one script for each user, to search for more information about them in the log.But I don't know how to output a single line from a file, and google does not return any solution.
View 3 Replies View RelatedProgramming :: Using An Awk Command To Print A Line From A Cvs File?
Mar 4, 2011I am using an awk command to print a line from a cvs file.the awk command includes an if statement that filter the output-lets say i want to print all the lines that the price field is greater than 30.i have it working when i put the parameters myself.. but when i try to send them with vars it wont work..i am sending the sign of the if statement - can only be: == , < , >it looks like this:
cat file.csv | awk -v sign=">" -v field="2000" '{if($3 sign field) printf "%-12s%-12s%-12s%-12s
",$1,$2,$3,$4}' FS=,
the bold part is the problem , because when i put the sign parameter myself t works great.. i guess its a chars issue but i cant spot it
Programming :: Bash - Delete Only One Line From A File?
Apr 9, 2011I would like to delete a single line from a file that contains many lines passing through the same values as the two parameters. Again, I would like to delete a single line and not all those that contain parameters. How can I make bash?
View 14 Replies View RelatedProgramming :: Read In A File 1 Line At A Time?
Oct 22, 2010i am trying to read in a file 1 line at a time and for some reason it stops printing out at about line 62,000.
i am doing this:
Code:
while(fgets(c0, 1085, fstream0) != NULL)
but after about 62,0000 lines it stops printing. no seg-fault, no core dump. it just stops printing to the terminal then returns me to the command line after a couple of minutes. as a hack i am doing split -l 50000 on the input and calling my program 5 times.is there some limitation on fgets that i am not understanding ?
Programming :: How To Append Text To Second Line Of File?
Nov 6, 2010Say I have a text file like:
Code:
1
3
4
How would I use ksh to put the number '2' into the second line of that file?Okay it's not bash, it's ksh because this computer is OpenBSD
Programming :: Insert A Line In The Test File With Sed?
Jul 15, 2010I have following file workers file: There are 800 entries like this.
# consensus/uat
worker.consensus-uat1.host=lonlx10409
worker.consensus-uat1.port=13702
worker.consensus-uat1.type=ajp13
[code]....
I want to insert one line just below the line starting with "woker.list". I think sed can do it but I am not aware.
Programming :: Read Each Line Of A File As Input?
Jun 21, 2011I'm writing a program which now accepts user input:
Code:
echo "Enter a date in the format YYYY MM DD hh mm ss."
read gregyr gregmo gregdy greghr gregmn gregsc This lets the user input a date and time, such as 2011 06 21 15 12 45, and have each number assigned to their corresponding variable. Later in the program, these variables are put into an equation, and then the terminal spits out the answer. Now I have to have the program read all of the lines from a text file, which is in this format, assign the variables.
Programming :: Updating A Line In A Text File?
Dec 31, 2010I have a text file called namelist.wps. In this file there is a line that reads:
Code:
start_date = '2010-12-26_12:00:00', '2010-12-26_12:00:00',
I have to automatically update the year, month, and day of month for this line without changing the rest of the file. Here is the script that I have:
[Code]....
Programming :: Updating A Single Line In A Text File?
Dec 30, 2010I have a text file called namelist.wps. In this file there is a line that reads:Code: start_date = '2010-12-26_12:00:00', '2010-12-26_12:00:00', I have to automatically update the year, month, and day of month. I set values for the year, month, and day of month using the following code in a c-shell script:Code: set y1 = `date +%Y`set m1 = `date +%m`set d1 = `date +%d` After I do this, how do I update year, month, and day of month, without changing any of the other lines in the namelist.wps file?
View 2 Replies View RelatedProgramming :: [Java] Append Something To Each Line In A Text File?
Apr 15, 2009I am thinking of appending something to each line in a text file with Java. I prefer not write a new file with content appended from the old one.That 'something' would probably be Time Stamp when the file is created (which is same for each line).I am not sure Java provide some easy way for it or not
View 3 Replies View RelatedProgramming :: Bash Script Which Uses Awk To To Fetch A Line From A File?
Mar 24, 2010Below is the part of my bash script which uses awk to to fetch a line from a file. Choice is set by a case, and i know it is receiving a proper number because of the echo statement. The problem is with the syntax of the awk command it says the error is with one of the ', but when I run the command at the command line and replace "$choice" with a number it works properly. So I am not sure what is going on.
echo "announcing choice $choice"
command="awk 'NR = "$choice"' beerpong.txt | say"
$command