I have a file: a.txt
a,b,c,d,6,6,6
1,2,3,d,6,6,6
4,5,6,6,6,6,6
Code:
#!/usr/bin/perl
use warnings;
use strict;
my @array = ();
### Load file into array
for my $i (split '\n', `cat /tmp/a.txt`) {
push @array, [ split ',', $i ];
}
It works. But my a.txt have 1million lines, and each lines have 17 fields. If use 'cat' like above, it takes veeeeeeeeeery long time.
How to do it using open?, especially need to split ',' for each line.
Hi All, I really need your help. I am a begginner in shell script and I believe this is a very simple issue.
I have in my directory, n-files, like 1.dhm, 2.dhm, 3.dhm.
These files have 1 column with 1 value per line, like:
1.dhm
------
10
20
30
40
50
2.dhm
------
30
50
20 (3 Replies)
STEP 1
# Set variable
FILE=/tmp/mainfile
SEARCHFILE =/tmp/searchfile
# THIS IS THE MAIN FILE.
cat /tmp/mainfile
Interface Ethernet0/0 "outside", is up, line protocol is up
Hardware is i82546GB rev03, BW 100 Mbps
Full-Duplex(Full-duplex), 100 Mbps(100 Mbps)
MAC address... (6 Replies)
What is wrong with my menu script? Do I need to continue with the read statements? All I want to do with option 4 is to cat some /var/log/files and awk out a few lines? How do I do that please?
$ cat menu.sh ... (11 Replies)
Hi All,
Does anyone know how to read multiple lines from standard input into an array and then iterate a loop for all the lines read. Below is an example pseudocode:
I need the below filenames to be read by the script into an array or something similar:
And then in the script, I... (9 Replies)
Hello, I'm trying to create a BASH file that can read all the files in my working directory and tell me how many words and lines are in that file. I wrote the following code:
FILES="*"
for f in "$FILES"
do
echo -e `wc -l -w $f`
done
My issue is that my file is outputting in one... (4 Replies)
Hi All,
I have stumbled upon very unique issue. In my script I am doing cat file and then greping and cutting so as to assign the value to variable. My file is,
<mxc_tl_load_extractdata_prop.bsh>
DB_USER=test_oper
hostname=xxx
FTP_USER=test1_operate
MAIL_LIST=xxx@yyy.com... (1 Reply)
I have an array and two variables as below,
I need to check if $datevar is present in $filename.
If so, i need to replace $filename with the values in the array.
I need the output inside an ARRAY
How can this be done.
Any help will be appreciated. Thanks in advance. (2 Replies)
Hi.
I'm just wondering how can I read variable text files through cat command.
I made a shell script to count frequency of words and array them with variable conditions. It's only working for one file that I wrote in script now. But I want to make it working for every text file when I execute... (2 Replies)
I am trying to create a script which will read 2 files and use the lines of file 1 for each line on file 2.
here's my sample code
cat $SBox |
while read line
do
cat $Date |
while read line
do $SCRIPTEXE <line from first file> $2 <line from 2nd file>
... (12 Replies)
Hi,
Normally, I would do
cat /etc/oratab | grep -v "^#" | grep -v "^*" > /tmp/oratab.00
while read line
do
echo $line
done < /tmp/oratab.00I want to know whether it is possible to use an array instead of re-directing it to file?
As a test, I did something like below:
#!/bin/ksh
... (6 Replies)
Discussion started by: newbie_01
6 Replies
LEARN ABOUT HPUX
split
split(1) General Commands Manual split(1)NAME
split - split a file into pieces
SYNOPSIS
line_count] suffix_length] [file [name]]
nsuffix_length] [file [name]]
Obsolescent
n] [file [name]]
DESCRIPTION
reads file and writes it in pieces (default 1000 lines) onto a set of output files. The name of the first output file is name with
appended, and so on lexicographically, up to (only ASCII letters are used, a maximum of 676 files). If no output name is given, is the
default.
If no input file is given, or if is given instead, the standard input file is used.
Options
recognizes the following command-line options and arguments:
The input file is split into pieces
line_count lines in size.
suffix_length letters are used to form the suffix of the output filenames. This option allows creation of more than 676 output
files. The output file names created cannot exceed the maximum file name length allowed in the directory containing
the files.
The input file is split into pieces
n bytes in size.
The input file is split into pieces
n x 1024 bytes in size. No space separates the n from the
The input file is split into pieces
n x 1048576 bytes in size. No space separates the n from the
The input file is split into pieces
n lines in size. This option is obsolescent and is equivalent to using the option.
EXTERNAL INFLUENCES
Environment Variables
determines the locale for the interpretation of text as single- and/or multi-byte characters.
determines the language in which messages are displayed.
If or is not specified in the environment or is set to the empty string, the value of is used as a default for each unspecified or empty
variable. If is not specified or is set to the empty string, a default of "C" (see lang(5)) is used instead of
If any internationalization variable contains an invalid setting, behaves as if all internationalization variables are set to "C". See
environ(5).
International Code Set Support
Single- and multi-byte character code sets are supported.
SEE ALSO csplit(1).
STANDARDS CONFORMANCE split(1)
11-12-2009
