[Home] [Downloads] [Search] [Help/forum]

Gammon Software Solutions forum

See www.mushclient.com/spam for dealing with forum spam. Please read the MUSHclient FAQ!

[Folder]  Entire forum
-> [Folder]  MUSHclient
. -> [Folder]  Lua
. . -> [Subject]  string finding a whole word only?
Home  |  Users  |  Search  |  FAQ
Username:
Register forum user name
Password:
Forgotten password?
string finding a whole word only?

[Reply to this subject]  Reply to this subject   [New subject]  Start a new subject   [Refresh] Refresh page

Posted by Rivius   (93 posts)  [Biography] bio
Date Fri 06 May 2011 05:56 PM (UTC)  [ quote  ]
Message
I was wondering what the regex syntax would be for finding a word would look like.

For example:

string.find("banana bananapeel", "banana")

returns true on both banana and bananapeel. However, I want it to strictly match just the word "banana". How would I do this?
[Go to top] top
Posted by Twisol   USA  (2,230 posts)  [Biography] bio
Date Reply #1 on Fri 06 May 2011 06:27 PM (UTC)  [ quote  ]
Message
Lua's built-in pattern matching library doesn't really have a word-border match, but PCRE does:
local re = rex.new("\bbanana\b")
-- re can be created once and used many times
local s, e, matches = re:match("banana bananapeel")


http://www.gammon.com.au/forum/?id=4905
'Soludra' on Achaea

Blog: http://jonathan.com/
GitHub: http://github.com/Twisol
[Go to top] top
Posted by Fiendish   USA  (851 posts)  [Biography] bio   Global Moderator
Date Reply #2 on Fri 06 May 2011 08:15 PM (UTC)  [ quote  ]
Message
Lua can do anything!


my_string = "bananaphone banana"
find_me = "banana"
start,finish = string.find(string.gsub(my_string,"(.*)"," %1 "), "[^%a]"..find_me.."[^%a]")
finish = finish-2


:D
http://aardwolfclientpackage.googlecode.com/
[Go to top] top
Posted by Nick Gammon   Australia  (18,800 posts)  [Biography] bio   Forum Administrator
Date Reply #3 on Fri 06 May 2011 10:26 PM (UTC)  [ quote  ]
Message
Also see:

Template:post=6034 Please see the forum thread: http://gammon.com.au/forum/?id=6034.


Scroll down to near the bottom about the "frontier pattern". That does exactly what you want, because it detects the transition between letters and non-letters.
- Nick Gammon

www.gammon.com.au, www.mushclient.com
[Go to top] top

The dates and times for posts above are shown in Universal Co-ordinated Time (UTC).

To show them in your local time you can join the forum, and then set the 'time correction' field in your profile to the number of hours difference between your location and UTC time.

1,897 views.

[Reply to this subject]  Reply to this subject   [New subject]  Start a new subject   [Refresh] Refresh page

Go to topic:           Search the forum

[Go to top] top

[Home]

Written by Nick Gammon - 5K

Comments to: Gammon Software support
[RH click to get RSS URL] Forum RSS feed ( http://www.gammon.com.au/rss/forum.xml )

[Best viewed with any browser - 2K]    [Internet Contents Rating Association (ICRA) - 2K]    [Web site powered by FutureQuest.Net]