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Top Forums UNIX for Dummies Questions & Answers How to convert a comma delimited string to records or lines of text? Post 302923876 by newbie_01 on Wednesday 5th of November 2014 01:25:38 AM
Old 11-05-2014
How to convert a comma delimited string to records or lines of text?

Hi,

I am not sure if I've posted this question before.

Anyway, I previously asked about converting lines of text into a comma delimited string. Now I am needing to do the other way around ... Smilie Smilie

Can anyone advise how is this possible?

Example as below:

Converting records/lines to a single delimited string

Code:
$ cat /tmp/x.txt
user1
user2
user3
user4
$ cat /tmp/x.txt | awk 'NR == 1 {printf "%s", $0; next} {printf ",%s", $0} END {print ""}'
user1,user2,user3,user4

$

Now I need to read a comma delimited string and convert it into records. So reading the string

Code:
user1,user2,user3,user4

And making it into something like below sorted accordingly.

Code:
user1
user2
user3
user4


I then compare this with another list of records and check for differences Smilie

Advise much appreciated. Thanks in advance.
 

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fmt(1)							      General Commands Manual							    fmt(1)

NAME
fmt - format text SYNOPSIS
width] [file...] DESCRIPTION
The command is a simple text formatter that fills and joins lines to produce output lines of (up to) the number of characters specified in the width option. The default width is 72. concatenates the arguments. If none are given, formats text from the standard input. Blank lines are preserved in the output, as is the spacing between words. does not fill lines beginning with a period for compatibility with Nor does it fill lines starting with Indentation is preserved in the output and input lines with differing indentation are not joined (unless is used). can also be used as an in-line text filter for the command: reformats the text between the cursor location and the end of the paragraph. Options recognizes the following options: Crown margin mode. Preserve the indentation of the first two lines within a paragraph and align the left margin of each subsequent line with that of the second line. This is useful for tagged paragraphs. Split lines only. Do not join short lines to form longer ones. This prevents sample lines of code, and other such "formatted" text, from being unduly combined. Fill output lines to up to width columns. WARNINGS
The width option is acceptable for BSD compatibility, but it may go away in future releases. SEE ALSO
nroff(1), vi(1). fmt(1)
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