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Unable to string.find for "[[" - CC version 1.63

Started by Geforce Fan, 15 February 2015 - 07:27 PM

Geforce Fan #1

1029 posts

Location Missouri, United States, America, Earth, Solar System, Milky Way, Universe 42B, Life Street, Multiverse, 4th Dimension

Posted 15 February 2015 - 08:27 PM

Bug:
When trying to string,find for [[ , it will give you:
Lua:1: vm error: java.lang.arrayIndexOutOfBoundsException: 2
What I did:
f=string.find("[[]]","[[")
It happens any time you search for [[ , though. Screenies aren't really necessary here.
edit: also, it happens if you search for "=[[". It gives the same error, but a 3 rather than 2
doubleedit: no, it errors any time you find "[" using string.find in a string.

Edited on 15 February 2015 - 07:35 PM

SquidDev #2

SquidDev's profile picture

1426 posts

Location Does anyone put something serious here?

Posted 15 February 2015 - 08:39 PM

Looking at string patterns, you can see that [ and ] serve a similar purpose to that in regexes.

You can pass an optional 4th argument to string.find which is plain. So you would want to have:


-- Find [[ in [[]] from position 1, without using Lua patterns
string.find("[[]]", "[[", 1, true)

This isn't a bug and is the correct behaviour for Lua.

Lignum #3

Lignum's profile picture

570 posts

Posted 15 February 2015 - 09:12 PM

You can also prefix the symbol with a percent sign if you prefer.


string.find("[[]]", "%[%[")

Geforce Fan #4

1029 posts

Location Missouri, United States, America, Earth, Solar System, Milky Way, Universe 42B, Life Street, Multiverse, 4th Dimension

Posted 15 February 2015 - 10:18 PM

Oh. Thank you.

Lyqyd #5

Lyqyd's profile picture

8543 posts

Posted 16 February 2015 - 03:24 PM

Moved to Ask a Pro.