Find function and regex in lua

Question

 local ct = s:find('[ \t]', 80)

find function in Lua is generally used to find a particular pattern in a given string. In above line of code, we are passing '[ \t]' as the pattern to find along with 80.

What does it mean to pass [ \t] as the pattern to find and where is this 80 coming from? As far as I know, find function takes only two parameters i.e the string and the pattern to find.

Thanks

lhf · Accepted Answer · 2014-10-14 16:15:35Z

1

The pattern [ \t] matches one space or one tab.

The match is attempted starting at position 80 in the given string.

string.find accepts two optional arguments besides the string and the pattern.

answered Oct 14, 2014 at 16:15

lhf

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