[SOLVED] Regex to Search and Replace Repeatedly

devUnix · 10-05-2012, 06:00 AM

Hi,

Using Regex / Regular Expressions, I want to replace all the instances of 123 with 12 and the final data-set/result should not contain any 123 in it. Example:

Code:

[demo@devhost ~]$ cat data
123333
123123456 123333 12333
[demo@devhost ~]$ cat data | sed 's/123/12/g'
12333
1212456 12333 1233
[demo@devhost ~]$

You can see that there are still instances of 123. So, how do we make sure that the final output would not contain 123?

druuna · 10-05-2012, 06:14 AM

Is this what you are looking for:

Code:

sed 's/123\{1,\}/12/g' data 
12
1212456 12 12

The {1,} part tells sed to look for one or more 3's.

devUnix · 10-05-2012, 06:31 AM

Quote:

Originally Posted by druuna

Is this what you are looking for:

Code:

sed 's/123\{1,\}/12/g' data 
12
1212456 12 12

The {1,} part tells sed to look for one or more 3's.

Great, man! I just missed that point! Thanks!