CODEWITHSUNDEEP
bashshellunix
user1360250
user1360250

Reputation: 331

Bash - Extract numbers from String

I got a string which looks like this:

"abcderwer 123123 10,200 asdfasdf iopjjop"

Now I want to extract numbers, following the scheme xx,xxx where x is a number between 0-9. E.g. 10,200. Has to be five digit, and has to contain ",".

How can I do that?

Thank you

Upvotes: 5

Views: 23460

Answers (6)

bos
bos

Reputation: 6555

The following example using your input data string should solve the problem using sed.

$ echo abcderwer 123123 10,200 asdfasdf iopjjop | sed -ne 's/^.*\([0-9,]\{6\}\).*$/\1/p'
10,200

Upvotes: 0

keyser
keyser

Reputation: 19189

Check out pattern matching and regular expressions.

Links:

Bash regular expressions

Patterns and pattern matching

SO question

and as mentioned above, one way to utilize pattern matching is with grep. Other uses: echo supports patterns (globbing) and find supports regular expressions.

Upvotes: 1

William Pursell
William Pursell

Reputation: 212654

A slightly non-typical solution:

< input tr -cd [0-9,\ ] | tr \  '\012' | grep '^..,...$'

(The first tr removes everything except commas, spaces, and digits. The second tr replaces spaces with newlines, putting each "number" on a separate line, and the grep discards everything except those that match your criterion.)

Upvotes: 0

Dennis Williamson
Dennis Williamson

Reputation: 360683

In pure Bash:

pattern='([[:digit:]]{2},[[:digit:]]{3})'
[[ $string =~ $pattern ]]
echo "${BASH_REMATCH[1]}"

Upvotes: 5

tripleee
tripleee

Reputation: 189936

Simple pattern matching (glob patterns) is built into the shell. Assuming you have the strings in $* (that is, they are command-line arguments to your script, or you have used set on a string you have obtained otherwise), try this:

for token; do
  case $token in
    [0-9][0-9],[0-9][0-9][0-9] ) echo "$token" ;;
  esac
done

Upvotes: 1

codaddict
codaddict

Reputation: 455440

You can use grep:

$ echo "abcderwer 123123 10,200 asdfasdf iopjjop" | egrep -o '[0-9]{2},[0-9]{3}'
10,200

Upvotes: 11

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