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Dr.Disrespect
Grandmaster Cheater
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Joined: 17 Feb 2016
Posts: 526
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 Posted: Tue Nov 01, 2016 11:27 pm Post subject: String manipulation in CE.(solved) |
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1. In C#, there is String.Split method to split string into lines of smaller strings based on a delimiter. Is there a similar method in CE or a work around?
2. In CE, are there functions similar to ReadLine() and WriteLine() in .NET?
PS: I have check main.lua, but did not find anything similar.
Thanks in advance for your time.
Update:
With regard to the length of a string, can I use the length operator "#" to get the length of a given string?
Update 2:
I have found a way (sort of) to split strings in Lua：
| Code: |
words = {}
s = "This is a string"
for w in string.gmatch(s, "%a+") do
words[#words+1] = w
end
print(words[1])
print(words[2])
print(words[3])
print(words[4])
out will be:
This
is
a
string
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daspamer
Grandmaster Cheater Supreme
 Reputation: 54
Joined: 13 Sep 2011
Posts: 1588
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| Posted: Wed Nov 02, 2016 12:37 am Post subject: |
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Look into lua string library
https://www.lua.org/manual/5.3/manual.html#6.4
And tutorial
http://lua-users.org/wiki/StringLibraryTutorial
And patterns tutorial
http://lua-users.org/wiki/PatternsTutorial
One method to split strings,
| Code: | str = "hello, there, dear user"
pat = ",?" -- delimeter is "," and the question mark (?) represents optinal, basically makes lua capture characters until it hits first delimeter or end of the string.
tResults = {str:match((str:gsub("[^"..pat.."]*"..pat, "([^"..pat.."]*)"..pat)))} -- too many patterns and it will fail, you could always do it in a function instead
print(#tResults,unpack(tResults))
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you can get string length by either or
if you want to read/write files by lines then heres one method to read a file by lines
| Code: | f = io.open("C:\\filename.txt", "r") -- opens a file to read
if (f) then
local data = f:read("*all"); -- gets all file data
f:close(); -- closes the file
for line in data:gfind("[^\n]+") do
print(line)
end
end |
_________________
I'm rusty and getting older, help me re-learn lua.
Last edited by daspamer on Wed Nov 02, 2016 12:40 am; edited 1 time in total |
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Dr.Disrespect
Grandmaster Cheater
![]() Reputation: 3
Joined: 17 Feb 2016
Posts: 526
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| Posted: Wed Nov 02, 2016 12:40 am Post subject: |
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| DaSpamer wrote: | Look into lua string library
https://www.lua.org/manual/5.3/manual.html#6.4
One method to split strings,
| Code: | str = "hello, there, dear user"
pat = ",?"
tResults = {str:match((str:gsub("[^"..pat.."]*"..pat, "([^"..pat.."]*)"..pat)))} -- too many patterns and it will fail, you could always do it in a function instead
print(#tResults,unpack(tResults))
|
you can get string length by either or
if you want to read/write files by lines then heres one method to read a file by lines
| Code: | f = io.open("C:\\filename.txt", "r") -- opens a file to read
if (f) then
local data = f:read("*all"); -- gets all file data
f:close(); -- closes the file
for line in data:gfind("[^\n]+") do
print(line)
end
end |
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Thank you so much. I wasn't sure at the beginning whether I could use all the Lua libraries in CE. 
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