Re: string.gsub (Lua 5.1.1)

Subject: Re: string.gsub (Lua 5.1.1)
From: Philippe Lhoste &lt;PhiLho@ ... &gt;
Date: 2006年11月06日 19:11:02 +0100

George Petsagourakis a écrit :

Shmuel Zeigerman <shmuz <at> actcom.co.il> writes:

Let's see another example:
 print (string.gsub ("abc123", "(.)",
 function(c)
 local n = tonumber(c)
 return n and n+1
 end))

abc234	6

It seems returning "abc234", 3 would make more sense.

Not at all... six (6) substitutions done.. thats all. thats what the dot do in
Lua's regular expressions. try %d for numbers or %a for letters.

No, 6 matches, but only 3 substitutions, the first three chars make thefunction return nil, so there is no substitution.

--
Philippe Lhoste
-- (near) Paris -- France
-- http://Phi.Lho.free.fr
-- -- -- -- -- -- -- -- -- -- -- -- -- --

References:
- string.gsub (Lua 5.1.1), Shmuel Zeigerman
- Re: string.gsub (Lua 5.1.1), Nick Gammon
- Re: string.gsub (Lua 5.1.1), Shmuel Zeigerman
- Re: string.gsub (Lua 5.1.1), George Petsagourakis