Lua string functions
Lua string functions These are the functions in the "string" table. Indices, where used, start at 1 for the first character (not zero). Negative numbers count from the right, so -1 is the last character, -2 the second last, and so on. All strings have a metatable added to them by Lua with an __index entry pointing to the string table. What this means is that you can write string function calls in two ways:
    s = "hello, world"
    string.len (s) --> 12
    s:len ()       --> 12
The second version is shorter as the word "string" is implied. Note the colon after the s, not a dot. See Also ... Topics Lua base functions Lua bc (big number) functions Lua bit manipulation functions Lua coroutine functions Lua debug functions Lua io functions Lua math functions Lua os functions Lua package functions Lua PCRE regular expression functions Lua script extensions Lua table functions Lua utilities Regular Expressions Scripting Lua functions string.byte (Converts a character into its ASCII (decimal) equivalent) string.char (Converts ASCII codes into their equivalent characters) string.dump (Converts a function into binary) string.find (Searches a string for a pattern) string.format (Formats a string) string.gfind (Iterate over a string (obsolete in Lua 5.1)) string.gmatch (Iterate over a string) string.gsub (Substitute strings inside another string) string.len (Return the length of a string) string.lower (Converts a string to lower-case) string.match (Searches a string for a pattern) string.rep (Returns repeated copies of a string) string.reverse (Reverses the order of characters in a string) string.sub (Returns a substring of a string) string.upper (Converts a string to upper-case) (Help topic: general=lua_string) Documentation contents page