Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: How to read values and store in array?
Top Forums Shell Programming and Scripting How to read values and store in array? Post 302671313 by bakunin on Friday 13th of July 2012 10:47:11 AM
Old 07-13-2012
You do it straightforward. An array is just another variable after all and variables in shell scripts can be created just by using them.

Alas you haven't said which shell you are using, so as your penance for omitting this vital information i just suppose you are using Korn shell (ksh) and if you don't you will have to translate my solution to your shell yourself. ;-))

Suppose the following input file. We want all the lines "data=<value>" and store the "<value>" in an indexed array (1-based):

Code:
# this is a test file
lalala
data=first array element
some more meaningless text
data=second array element
data=third array element
# we do not want this line to do anything
data=last array element
foo bar

Now the script, which will read it and put the content into an array, like stated above:

Code:
#! /bin/ksh
# first some declarations
typeset -i Index=0
typeset    Line=""
typeset    Input="/path/to/file.above"

# At first we fill the array:
(( Index = 1 ))                               # we want to start our indices with 1
grep "^data=" "$Input" | while read Line ; do
     typeset Array[$Index]="${Line##data=}"   # split off "data=", leaving value
     (( Index += 1 ))                         # increment index
done

# now let us try to display the array contents:
(( Index = 1 ))                               # reset our array index
                                              # ${#Array[*]} evaluates to the number of elements in the array
while [ $Index -le ${#Array[*]} ] ; do
     print - "display array index ${Index}:\t ${Array[$Index]}"
     (( Index += 1 ))
done

exit 0

I hope this helps.

bakunin
 

10 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

how do I store the values in array using shell

Hi, Is is possible to get the value using shell script? x=1 y1 = 10 y2 = 15 y3 = 7 echo $y$x is giving y1 (variable name) but I need the value of y1 (i.e. 10 dynamically) Is there any solution? if so, please mail me at kkodava@maxis.com.my ... (2 Replies)
Discussion started by: krishna
2 Replies

2. UNIX for Dummies Questions & Answers

How to store the values in a file into an array

Hi, I do have a file and the contents are as follws: 10 20 30 40 50 Now I want to store those values into an array. How can be done this ?? (3 Replies)
Discussion started by: risshanth
3 Replies

3. UNIX for Dummies Questions & Answers

trouble using read to store values in variables from command output

I know there are caveats about using read in pipelines because read is treated by a subshell. I know this but I can't think of any way to accomplish this regardless, I'm still a rookie. I hope somebody will be able to interpret what it is that I'm trying to accomplish and correct me. ... (2 Replies)
Discussion started by: ProGrammar
2 Replies

4. Shell Programming and Scripting

Read textfile and enter the values in array

Hi, I want to put values in .txt file into array. Example : $vi repo.txt abc def ghi jkl mno pqr i want the output to be like this: $echo ${mydf} abc $echo ${mydf} def $echo ${mydf} ghi (3 Replies)
Discussion started by: luna_soleil
3 Replies

5. Shell Programming and Scripting

Store values in an Array

Hi all. Well, I have the next code: I need to make an array with the values I have in the bucle, but just don't get it... Question is, how can I store in an array that values, and how can I display them with echo? (8 Replies)
Discussion started by: crcbad
8 Replies

6. Shell Programming and Scripting

Not able to read unique values in array

Hi Friends, I am having some trouble reading into an array. Basically, I am trying to grep for a pattern and extract it's value and store the same into an array. For eg., if my input is: <L:RECORD>name=faisel farooq,age=21, company=TCS,project=BT</L:RECORD> <L:RECORD>name=abc... (1 Reply)
Discussion started by: faiz1985
1 Replies

7. Shell Programming and Scripting

Store values from a file into an array variable in Shell

Dear All, I have been trying to do a simple task of extracting 2 fields from the file (3 rows) and store it in an array variable. I tried with: #! /bin/bash ch=`cut -f10 tmp.txt` counter=0 for p in $pid do c=${ch} echo "$c ..$counter" counter=$((counter+1))... (2 Replies)
Discussion started by: ezhil01
2 Replies

8. Shell Programming and Scripting

Store the output values in array

Hi, How to store the values in array from output result, EG: I have the result like this, ps, google, 1.txt, 1 sam, google, 2.txt, 2 These are the four values followed by comma in two sets. I need to store these values set by set. One set contains four values followed by comma. ... (2 Replies)
Discussion started by: KarthikPS
2 Replies

9. UNIX for Dummies Questions & Answers

How to store/read multiple values from a varible

Hi, when I enter 'ps -ef| grep process_name'/'psu | grep process_name', i am getting multiple number of lines output( i mean multiple no of processes).how can i store it one by one and echo it in the same way(one by one). part of script is var1=$(remsh hostname -l username ps -ef|grep... (2 Replies)
Discussion started by: jeanzibbin
2 Replies

10. Shell Programming and Scripting

awk loop using array:wish to store array values from loop for use outside loop

Here's my code: awk -F '' 'NR==FNR { if (/time/ && $5>10) A=$2" "$3":"$4":"($5-01) else if (/time/ && $5<01) A=$2" "$3":"$4-01":"(59-$5) else if (/time/ && $5<=10) A=$2" "$3":"$4":0"($5-01) else if (/close/) { B=0 n1=n2; ... (2 Replies)
Discussion started by: klane
2 Replies

LEARN ABOUT DEBIAN

sql::translator::schema::index

SQL::Translator::Schema::Index(3pm)			User Contributed Perl Documentation		       SQL::Translator::Schema::Index(3pm)

NAME

       SQL::Translator::Schema::Index - SQL::Translator index object

SYNOPSIS

	 use SQL::Translator::Schema::Index;
	 my $index = SQL::Translator::Schema::Index->new(
	     name   => 'foo',
	     fields => [ id ],
	     type   => 'unique',
	 );

DESCRIPTION

       "SQL::Translator::Schema::Index" is the index object.

       Primary and unique keys are table constraints, not indices.

METHODS

   new
       Object constructor.

	 my $schema = SQL::Translator::Schema::Index->new;

   fields
       Gets and set the fields the index is on.  Accepts a string, list or arrayref; returns an array or array reference.  Will unique the field
       names and keep them in order by the first occurrence of a field name.

	 $index->fields('id');
	 $index->fields('id', 'name');
	 $index->fields( 'id, name' );
	 $index->fields( [ 'id', 'name' ] );
	 $index->fields( qw[ id name ] );

	 my @fields = $index->fields;

   is_valid
       Determine whether the index is valid or not.

	 my $ok = $index->is_valid;

   name
       Get or set the index's name.

	 my $name = $index->name('foo');

   options
       Get or set the index's options (e.g., "using" or "where" for PG).  Returns an array or array reference.

	 my @options = $index->options;

   table
       Get or set the index's table object.

	 my $table = $index->table;

   type
       Get or set the index's type.

	 my $type = $index->type('unique');

       Get or set the index's type.

       Currently there are only four acceptable types: UNIQUE, NORMAL, FULL_TEXT, and SPATIAL. The latter two might be MySQL-specific. While both
       lowercase and uppercase types are acceptable input, this method returns the type in uppercase.

   equals
       Determines if this index is the same as another

	 my $isIdentical = $index1->equals( $index2 );

AUTHOR

       Ken Youens-Clark <kclark@cpan.org>.

perl v5.14.2							    2012-01-18				       SQL::Translator::Schema::Index(3pm)
All times are GMT -4. The time now is 06:27 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy