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string.sub()

string.sub (s, i [, j])sijijjstring.sub(s,1,j)sjstring.sub(s, -i)isi

If, after the translation of negative indices, i is less than 1, it is corrected to 1. If j is greater than the string length, it is corrected to that length. If, after these corrections, i is greater than j, the function returns the empty string.

Links:

https://www.lua.org/manual/5.3/manual.html#pdf-string.sub

doc_lua

2017-02-21 04:16:10

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