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st_of_dec
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Joined: 04 Jan 2018
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Location: AUS
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 Posted: Wed Mar 13, 2019 10:18 am Post subject: Question for Lua replacing one letter with specific location |
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Hi guys,
This question is more like pure LUA question, rather than celua.
Btw, thank Darkbyte for solving my problem last time.
Here we go. I got a script with 100 thousands letters, and I want to change one letter in a specific location. I have already got the location by using string.find() function, then I have totally no idea how to deal with it.
For instance,
| Code: |
local s = [[ayzihblol,{A,3,+,%-,qiwhoiqwjnkgoiuapuj,lol,oisouhnqlolqppoz,lol,hjfapsqhuoqwjs]]
s1 = string.find(s,"iuapuj,") -- here is how I got the location
-- my result would be "ayzihblol,{A,3,+,%-,qiwhoiqwjnkgoiuapuj,XXX,oisouhnqlolqppoz,lol,hjfapsqhuoqwjs"
-- which I replace the first separate lol into XXX
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I guess in this case, string.gsub() is out of use, because it is not only for global replacing, but also the module string is too difficult.
Regards.
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Dark Byte
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| Posted: Wed Mar 13, 2019 11:03 am Post subject: |
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perhaps
string.sub(s,1,s1-1)..newstuff..string.sub(s,s1+1)
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TheyCallMeTim13
Wiki Contributor
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Joined: 24 Feb 2017
Posts: 976
Location: Pluto
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| Posted: Wed Mar 13, 2019 11:18 am Post subject: |
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If it's still just the first one you need to replace "gsub" will work.
http://lua-users.org/wiki/StringLibraryTutorial
| Code: | local s = "Hello World, Hello World."
local s2 = string.gsub(s, "Hello", "Goodbye", 1)
print(s2) |
| Quote: |
Goodbye World, Hello World. |
If you prefer placeholders, this is what I use.
| Code: |
function interp(s, tbl)
if s == nil then return end
return (s:gsub('($%b{})', function(w) return tbl[w:sub(3, -2)] or w end))
end
local s = "Hello World, ${Greeting} World."
local s2 = interp(s, { Greeting = "Goodbye" })
print(s2) |
| Quote: |
Hello World, Goodbye World. |
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st_of_dec
Newbie cheater
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Joined: 04 Jan 2018
Posts: 10
Location: AUS
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| Posted: Thu Mar 14, 2019 4:49 am Post subject: |
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| Dark Byte wrote: | perhaps
string.sub(s,1,s1-1)..newstuff..string.sub(s,s1+1) |
Thanks for solving my question again.
Here is an example of my final code.
| Code: |
local s = "aaa".."bbb".."ccc"
print(s)
local lol = string.find(s,"b",1)
s = string.sub(s,1,lol-1).."ddd"..string.sub(s,lol+3)
print(s)
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