INTELLIGENT WORK FORUMS
FOR COMPUTER PROFESSIONALS

Log In

Come Join Us!

Are you a
Computer / IT professional?
Join Tek-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Tek-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Jobs

a reliable way to check for exact string occurence in a text file
2

a reliable way to check for exact string occurence in a text file

a reliable way to check for exact string occurence in a text file

(OP)

delimited by a space(s) or a tab(s).

eg. if in a line there is are:

u8-23.24.aaa 123.u8-23.24 u8-23.24.333

and want to check exactly for "u8-23.24" (in any field / line) I should get no match for above example line.

RE: a reliable way to check for exact string occurence in a text file

Hi

Should it be strictly delimited, or may be at the ends of the string ?

CODE --> command-line

# strictly delimited
grep '\su8-23.24\s' /path/to/input

# delimited or at the end of line
grep '\(^\|\s\)u8-23.24\(\s\|$\)' /path/to/input 

Feherke.
feherke.github.io

RE: a reliable way to check for exact string occurence in a text file

(OP)

thank you. PHV's method worked in my case. is the way (PHV's modified a bit) with variable ok below?

CODE

$ echo "u8-23.24.aaa 123.u8-23.24 u8-23.24.333\nu8-23.24.aaa 123.u8-23.24 u8-23.24.333 u8-23.24 u8-23.24.333"|nl
     1  u8-23.24.aaa 123.u8-23.24 u8-23.24.333
     2  u8-23.24.aaa 123.u8-23.24 u8-23.24.333 u8-23.24 u8-23.24.333
$ echo "u8-23.24.aaa 123.u8-23.24 u8-23.24.333\nu8-23.24.aaa 123.u8-23.24 u8-23.24.333 u8-23.24 u8-23.24.333"|nl|grep '\su8-23.24\s'
$ echo "u8-23.24.aaa 123.u8-23.24 u8-23.24.333\nu8-23.24.aaa 123.u8-23.24 u8-23.24.333 u8-23.24 u8-23.24.333"|nl|grep '\(^\|\s\)u8-23.24\(\s\|$\)'
$ echo "u8-23.24.aaa 123.u8-23.24 u8-23.24.333\nu8-23.24.aaa 123.u8-23.24 u8-23.24.333 u8-23.24 u8-23.24.333"|nl|grep -E '(^|[[:space:]])u8-23\.24([[:space:]]|$)'
     2  u8-23.24.aaa 123.u8-23.24 u8-23.24.333 u8-23.24 u8-23.24.333
$ A="u8-23.24"
$ echo "u8-23.24.aaa 123.u8-23.24 u8-23.24.333\nu8-23.24.aaa 123.u8-23.24 u8-23.24.333 u8-23.24 u8-23.24.333"|nl|grep -E '(^|[[:space:]])'$A'([[:space:]]|$)'
     2  u8-23.24.aaa 123.u8-23.24 u8-23.24.333 u8-23.24 u8-23.24.333
$ 

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Tek-Tips Forums free from inappropriate posts.
The Tek-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Tek-Tips forums is a member-only feature.

Click Here to join Tek-Tips and talk with other members!

Resources

Close Box

Join Tek-Tips® Today!

Join your peers on the Internet's largest technical computer professional community.
It's easy to join and it's free.

Here's Why Members Love Tek-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close