Re: Error in PiL3 in Listing 12.1 (page 121)

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• Subject: Re: Error in PiL3 in Listing 12.1 (page 121)
• From: tomas <tomas@...>
• Date: 2015年7月05日 09:34:08 -0300

---

Hi Egor

A correct code may look like the following:
function quote (s)
 -- find maximum length of sequences of equal signs
 local n = -1
 for w in string.gmatch(s, "]([]=]*)]") do
 for e in string.gmatch(w, "=*") do
 n = math.max(n, #e)
 end
 end
 -- The rest of the code is exactly the same as in the book

I test your code but it seems it does not handle all cases at all:
Lua 5.2.3 Copyright (C) 1994-2013 Lua.org, PUC-Rio

function quote(s)

 local n = -1
 for w in string.gmatch(s, "]([]=]*)]") do
 for e in string.gmatch(w, "=*") do
 n = math.max(n, #e)
 end
 end
 local eq = string.rep("=", n+1)
 return string.format(" [%s[\n%s]%s] ", eq, s, eq)
end

print(quote"]=]==")

 [==[
]=]==]==]

Regards,
Tomás

---

• Follow-Ups:
  • Re: Error in PiL3 in Listing 12.1 (page 121), Egor Skriptunoff

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  • Error in PiL3 in Listing 12.1 (page 121), Egor Skriptunoff

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