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➜ MUSHclient
➜ General
➜ BUG of LUA or Muchclient?
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BUG of LUA or Muchclient?
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| Posted by
| Paragate
(5 posts) Bio
|
| Date
| Mon 07 Mar 2011 11:31 PM (UTC) Amended on Tue 08 Mar 2011 07:16 PM (UTC) by Paragate
|
| Message
| If one has a string like this:
s={"a","b","c","d-e"}
Then string.find(s,"d-e") will return nil.
The pattern I want to find is saved in a variable and it keeps changing, we don't know if the pattern to find has "-"
or not, so to add "%" is not a good option for me.
Anyway to solve this? thanks | | Top |
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| Posted by
| Twisol
USA (2,257 posts) Bio
|
| Date
| Reply #1 on Tue 08 Mar 2011 (UTC) |
| Message
|
Paragate said:
If one has a string like this:
s={"a","b","c","d-e"}
This isn't a string, it's an array of strings. If you want to find a specific string within an array, you do:
local find_this = "d-e"
local idx = nil
for i,str in ipairs(s) do
if str == find_this then
idx = i
break
end
end
if idx then
-- it was found
end
You can even wrap this up as a generic function:
table.find = function(t, match)
for k, v in pairs(t) do
if v == match then
return k
end
end
return nil
end
-- Usage:
local t = {"foo", "bar", "baz"}
local i = table.find(t, "bar")
Note(i) -- should be 2
|
'Soludra' on Achaea
Blog: http://jonathan.com/
GitHub: http://github.com/Twisol | | Top |
|
| Posted by
| Nick Gammon
Australia (23,140 posts) Bio
Forum Administrator |
| Date
| Reply #2 on Tue 08 Mar 2011 05:56 AM (UTC) |
| Message
|
Paragate said:
If one has a string like this:
s={"a","b","c","d-e"}
Then string.find(s,"d-e") will return nil.
No, it doesn't. Test case:
s={"a","b","c","d-e"}
a = string.find(s,"d-e")
Results:
Run-time error
World: Smaug
Immediate execution
[string "Immediate"]:3: bad argument #1 to 'find' (string expected, got table)
stack traceback:
[C]: in function 'find'
[string "Immediate"]:3: in main chunk
You can't pass a table to string.find. So, it's not a bug. |
- Nick Gammon
www.gammon.com.au, www.mushclient.com | | Top |
|
| Posted by
| Paragate
(5 posts) Bio
|
| Date
| Reply #3 on Tue 08 Mar 2011 07:20 PM (UTC) |
| Message
| Thank you very much for the reply.
The generic function solved my problem
I used:
local str=table.concat(s,",") first before I use
string.find(str,pat)
Thanks for the replay again.
Nick Gammon said:
Paragate said:
If one has a string like this:
s={"a","b","c","d-e"}
Then string.find(s,"d-e") will return nil.
No, it doesn't. Test case:
s={"a","b","c","d-e"}
a = string.find(s,"d-e")
Results:
Run-time error
World: Smaug
Immediate execution
[string "Immediate"]:3: bad argument #1 to 'find' (string expected, got table)
stack traceback:
[C]: in function 'find'
[string "Immediate"]:3: in main chunk
You can't pass a table to string.find. So, it's not a bug.
| | Top |
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