Getting lines from .txt file


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Getting lines from .txt file
# 1  
Old 08-27-2013
Getting lines from .txt file

Hi

I have a file with contents:

Code:
NAMES
John
carrey
williams

How can I get all the names and store them in seperate variables(or arrays)

please keep in mind that the no. of such names is not known.Three here is a bogus value


~thanks

Last edited by Scott; 08-27-2013 at 08:13 PM.. Reason: Code tags
# 2  
Old 08-27-2013
Since you've not specified the language, I've assumed that you need a bash script.

Code:
[user@host ~]$ cat>file
John
carrey
williams
[user@host ~]$ cat test.sh
#! /bin/bash

i=0

while read line
do
    namesArr[$i]=$line
    (( i++ ))
done < file

echo ${namesArr[@]}
[user@host ~]$
[user@host ~]$ ./test.sh
John carrey williams
[user@host ~]$

# 3  
Old 08-27-2013
my bad !
Its bash Smilie
how can we use awk for this ??
# 4  
Old 08-27-2013
Using awk

Code:
awk '{a[i++]=$0} END{for(i in a){print a[i]}}'  inputfile

# 5  
Old 08-27-2013
If you don't want the Names' file to be among the files to be worked upon, you could also try
Code:
awk 'BEGIN {while (getline A[++i] < "file"); . . .

In bash, you might want to consider the mapfile builtin.
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Join Lines every paragraph in a file.txt

Hi all, Is there any idea on how to automate convert the paragraph in one line in a file, this will happen after OCR the documents, OCR split every paragraph. I need to join all the paragraph in one line. #cat file.txtThe Commission on Higher Education (CHED) was created through Republic Act... (7 Replies)
Discussion started by: lxdorney
7 Replies

2. Shell Programming and Scripting

Random shuffle of lines of a TXT file

Hello friends, I have a TXT file with 300 lines in it. I need to shuffle all the lines (randomly) so that they get into different order. Can anyone pls provide easy way, if any? I got it done by doing this below but I see it very lengthy/inefficient way. call random function to generate... (2 Replies)
Discussion started by: prvnrk
2 Replies

3. UNIX for Dummies Questions & Answers

find lines in file1.txt not found in file2.txt memory problem

I have a diff command that does what I want but when comparing large text/log files, it uses up all the memory I have (sometimes over 8gig of memory) diff file1.txt file2.txt | grep '^<'| awk '{$1="";print $0}' | sed 's/^ *//' Is there a better more efficient way to find the lines in one file... (5 Replies)
Discussion started by: raptor25
5 Replies

4. Shell Programming and Scripting

merging two .txt files by alternating x lines from file 1 and y lines from file2

Hi everyone, I have two files (A and B) and want to combine them to one by always taking 10 rows from file A and subsequently 6 lines from file B. This process shall be repeated 40 times (file A = 400 lines; file B = 240 lines). Does anybody have an idea how to do that using perl, awk or sed?... (6 Replies)
Discussion started by: ink_LE
6 Replies

5. Shell Programming and Scripting

sed to cp lines x->y from 1.txt into lines a->b in file2.txt

I have one base file, and multiple target files-- each have uniform line structure so no need to use grep to find things-- can just define sections by line number. My question is quite simple-- can I use sed to copy a defined block of lines (say lines 5-10) from filename1.txt to overwrite an... (3 Replies)
Discussion started by: czar21
3 Replies

6. Shell Programming and Scripting

Deleting lines that contain spaces in a txt file

I need some help deleting lines in a file that contain spaces. Im sure awk or sed will work but i dont know much about those commands. Any help is appreciated :D (7 Replies)
Discussion started by: r04dw4rri0r
7 Replies

7. Shell Programming and Scripting

Urgent Need Help! Merging lines in .txt file

I need to write a script that reads through an input .txt file and replaces the end value with the end value of the next line for lines that have distance <=4000. The first label line is not actually in the input. In the below example, 3217 is the distance from the end of the first line to the... (12 Replies)
Discussion started by: awknerd
12 Replies

8. Shell Programming and Scripting

print all even lines of a txt file

In other news, I have a colors text file with hundreds of lines, and I want to print only the even numbered lines. for example I have this file looks something like this: ALLCOLORS.TXT red red green red blue red red red green red red blue green green green blue blue blue red blue blue blue... (1 Reply)
Discussion started by: ajp7701
1 Replies

9. Shell Programming and Scripting

Moving lines within a txt file

A newbie to shell scripting..... I need some assistance in doing the following: I have a system generated text file(a makefile basically). Before I can execute the make command, I need to modify one section of this generated file. The generated section is as follows: # INCLUDE macro... (5 Replies)
Discussion started by: innocentspirit
5 Replies

10. Shell Programming and Scripting

how do I filter double lines from a txt file

Hi, I have a file with the following: access-list.txt router1 access-list 1 permit any any access-list 1 deny any any router2 access-list 2 permit any any access-list 2 deny any any router3 access-list 3 permit any any access-list 3 deny any any I want to hava an output that... (10 Replies)
Discussion started by: I-1
10 Replies
Login or Register to Ask a Question