CODEWITHSUNDEEP
regexlinuxsed
iamarunk
iamarunk

Reputation: 145

+ Regular Expression not working in sed

Team,

I have a file with data as mention below.

[root@ip-12-32-8-15 ~]# cat dbbackup

(555)555-1212

(555)555-1213

Expected Output:

First: (555) Second: 555- Third: 1212

First: (555) Second: 555- Third: 1213

I am using sed its not working .

sed -n -e 's/\([0-9]+)\)\([0-9]+-\)\([0-9]+\)/First: \1 Second: \2 Third: \3/p' dbbackup

Please Let me know how to achieve the above mention output.

Upvotes: 0

Views: 112

Answers (3)

potong
potong

Reputation: 58578

This might work for you (GNU sed):

sed -r 's/$/\nfirst:second:third:fourth:\n/;:a;s/^([(0-9]+[)-]?)([^\n]*\n)([^:]*:)(.*)/\2\4 \3 \1/;ta;s/\n.*\n //' file

This method matches the numbers at the front of the string with strings appended to the end of the line and then appends them to end of the introduced line. Eventually there are no more numbers to remove and then the introduced newlines/final space are deleted, leaving the required string.

N.B. Additional strings may be appended for further numbers.

Upvotes: 0

James Brown
James Brown

Reputation: 37464

In GNU awk (FIELDWIDTHS), no regex:

$ awk 'BEGIN{FIELDWIDTHS="5 4 4"}{print "First:",$1,"Second:",$2,"Third:",$3}' file
First: (555) Second: 555- Third: 1212
First: (555) Second: 555- Third: 1213

Another in sed:

$ sed 's/^/First: /1;s/./& Second: /12;s/./& Third: /25' file
First: (555) Second: 555- Third: 1212
First: (555) Second: 555- Third: 1213

Upvotes: 1

axiac
axiac

Reputation: 72425

You forgot the opening parenthesis before the first field. But this is not the reason it doesn't work.
It doesn't work because sed does not know +. Use * instead: 

sed -n -e 's/\(([0-9]*)\)\([0-9]*-\)\([0-9]*\)/First: \1 Second: \2 Third: \3/p'

Upvotes: 0

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