Re: Convert bytes array to string
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- Subject: Re: Convert bytes array to string
- From: Eric Tetz <erictetz@...>
- Date: 2002年3月16日 09:47:21 -0800 (PST)
--- SATO Seichi <seichi@air.ne.jp> wrote:
> How can I convert bytes array to string efficiently in Lua?
> or must I extend with C?
>
> a sample I wrote:
>
> function bytestostring (bytes)
> s = ""
> for i=1,getn(bytes) do
> s = s..strchar(bytes[i]) -- '..' create new string. Expensive!!
> end
> return s
> end
You can do something like this:
function bytestostring (bytes)
local buf = strrep(' ', getn(bytes))
local i = 0
return (gsub (buf, '(.)',
function(c)
i = i + 1
return strchar(bytes[i])
end))
end
Not exactly pretty, but it's a lot faster than string concatenation.
Cheers,
Eric
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