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string.find - strange result

 
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JC



Joined: 02 Jun 2006
Posts: 16
PostPosted: Mon Jun 26, 2006 9:58 am    Post subject: string.find - strange result Reply with quote
I am getting a 'strange' result using string.find to find a '.' (full stop) in a string. The function always returns 1 regardless of where the full stop is. The code below illustrates the issue. It prints two numbers the top one should be the position of the full stop within the string "abcdef.", but always returns 1.
The second line shows the correct behaviour for the letter e. Am I doing something silly here ?


Code:
screen:print(10,10,string.find("abcdef.","."),Color.new(255,255,255))
screen:print(10,20,string.find("abcdef.","e"),Color.new(255,255,255))


screen:flip()
screen.waitVblankStart()


pad = Controls.read()
while not pad:start() do
  pad = Controls.read()
end


TIA,
JC
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Drakonite
Site Admin


Joined: 17 Jan 2004
Posts: 989
PostPosted: Mon Jun 26, 2006 10:40 am    Post subject: Reply with quote
string.find doesn't just search for a string, it searches for a pattern. This page gives more info. If you do something such as string.find("abcdef.",".",1,true) it will disable pattern matching and just search for the string.
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JC



Joined: 02 Jun 2006
Posts: 16
PostPosted: Mon Jun 26, 2006 11:16 am    Post subject: Reply with quote
Thanks Drakonite,

Code:
string.find("abcdef.",".",1,true)


Does the trick.
Regards,
JC
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