Hello all,
My question is about Lua only, but I think here's the right place to ask
anyway.
I want a version of string.gsub that performs replacement in the string
but only from a certain index. For instance, in "abcabc", I would like
to replace "b" by "B", but only in the second part.
I have the following solution:
local sub, gsub = string.sub, string.gsub
function isub (str, pattern, replace, index, num)
-- Extract the suffix starting at given index
local s1 = sub(str, index)
-- Make the replacement on the suffix
local s2 = gsub(s1, pattern, replace, num)
-- Replace the suffix in the string with it modified version
return gsub(str, s1 .. "$", s2)
end
It works, but I find the solution an overkill for what seems to be a
basic operation. So, as I like to ask: have I missed something? (Yes,
probably LPeg, but I don't want to go into that for the moment.)
Best,
Paul
