Array Values from Text or CSV File in Shell

Question

I am having a script in which I am declaring arrays like below:

declare -a Pool=("Terrace|HouseTerrace_")
declare -a Library=("lib1 lib2 lib3")
declare -a Name=("Guru/Raju Albert Deepak")
declare -a Email=("[email protected],[email protected] [email protected] [email protected]")
Sub=("Media Rotation")
i=0
while [ $i -lt ${#Pool[@]}  ]
do
command blah balh blah
i=`expr $i + 1`
done

Now what i want is that instead of declaring values in aaray here i should import it from file (either text or csv ) or is there any better way perfroming this task. I don want to give access to script file to users.

@GURUSINGH: I don't understand what you are going to do here, all five of your 'arrays' consist of a single element only, so what's the point in declaring them as arrays? — user1934428
– user1934428, Commented Nov 29, 2019 at 8:30

dash-o · Accepted Answer · 2019-11-29 09:05:29Z

0

This is a partial answer, to help kick-start the OP effort.

The bash "readarray" can be used to load an array from a file. For example they code declare -a email=("[email protected]" "[email protected]" ...) can be replaced with

readarray email < email.txt

Where email.txt is (using posted data)

[email protected]
[email protected]
[email protected]
...

Another suggest improvement will be to use for item in instead of while loops to iterate over arrays. Instead of i=0 ; while [ $i -lt ${#Pool[@]} ] ; do ... ; done

for p in "${pool[@]}" ; do
   command $p
done

answered Nov 29, 2019 at 9:05

dash-o

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2 Comments

GURU SINGH Over a year ago

Thanks, Dash-o but my requirement is that for Pool "Terrace", select Library "lib1", select the name "Guru/Raju" and drop a mail to "[email protected],[email protected]". and again then second pool name,second lib,second name ...this way.It's like pick every first argument from each array and run the script.

dash-o Over a year ago

The answer is giving you a template as the requirement are not very detailed. If you need a specific entry to include multiple lines with comma separator, put that line into the text file. I strongly suggest that you will read one of the 'intro to bash programming' documents.

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