CODEWITHSUNDEEP
bashunixawksed
Soumitra
Soumitra

Reputation: 612

How to split string by a delimiter in unix

I have the following string and I want to split it into 3 parts:

Text:

<http://rdf.freebase.com/ns/american_football.football_player.footballdb_id>    <http://www.w3.org/2000/01/rdf-schema#label>    "footballdb ID"@en

Output should be

$1 = <http://rdf.freebase.com/ns/american_football.football_player.footballdb_id>
$2 = <http://www.w3.org/2000/01/rdf-schema#label>
$3 = "footballdb ID"@en

basically an splitting a RDF'sh tuple into its parts. I want to do this via a UNIX script , but I do not know sed or awk. Please help.

Upvotes: 1

Views: 3437

Answers (5)

Newbie
Newbie

Reputation: 1

awk '{ print "$1 = " $1 "\n$2 = " $2 "\n$3 = " $3 }'  filename

Upvotes: -2

Cyrus
Cyrus

Reputation: 88553

read A B C <<< $string
echo -e "\$1 = $A\n\$2 = $B\n\$3 = $C"

Output:

$1 = <http://rdf.freebase.com/ns/american_football.football_player.footballdb_id>
$2 = <http://www.w3.org/2000/01/rdf-schema#label>
$3 = "footballdb ID"@en

Upvotes: 2

Ed Morton
Ed Morton

Reputation: 203149

If your input fields are tab-separated, this will produce your posted desired output:

$ awk -F'\t' '{ for (i=1;i<=NF;i++) printf "$%d = %s\n", i, $i }' file
$1 = <http://rdf.freebase.com/ns/american_football.football_player.footballdb_id>
$2 = <http://www.w3.org/2000/01/rdf-schema#label>
$3 = "footballdb ID"@en

Alternatively this might be what you want if your fields are not tab-separated:

$ cat tst.awk
{
    gsub(/<[^>]+>/,"&\n")
    split($0,a,/[[:space:]]*\n[[:space:]]*/)
    for (i=1; i in a; i++)
        printf "$%d = %s\n", i, a[i]
}
$
$ awk -f tst.awk file
$1 = <http://rdf.freebase.com/ns/american_football.football_player.footballdb_id>
$2 = <http://www.w3.org/2000/01/rdf-schema#label>
$3 = "footballdb ID"@en

If that's not how your input fields are separated and/or not what you want output, update your question to clarify.

Upvotes: 3

Norman Ramsey
Norman Ramsey

Reputation: 202475

Whatever you use to split the string needs to recognize not only the white space but also the convention that the double quote "protects" the blank space before ID and prevents it from splitting the fields. I fear this computation may be beyond what is possible with sed. You could do it in awk, but awk provides little special advantage here.

You show a space-separated format with quotes. A similar problem is to parse comma-separated format with quotes. Related questions:

Upvotes: 1

Romeo Kienzler
Romeo Kienzler

Reputation: 3539

echo "your string" |awk -F" " '{ print $1 $2 $3 $4}'

Upvotes: -1

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