Concatenation

To concatenate strings, use the operator ..:

   local c = “Hey “
   local b = c..”nmaper!”
   print(b)

The output will be as follows:

   Hey nmaper!

String to number (and viceversa) conversion is done automatically by Lua.

Finding substrings

There will be a lot of occasions when you will need to know if a certain string is a substring of another string object, for example, to match the response of a network request. We can do this with Lua in a few different ways with the help of the following functions:

   string.find(s, pattern [, init [, plain]])
   string.match(s, pat)
   string.gmatch(s, pat)

The function string.find returns the position of the beginning and end of the string occurrence, or nil if not found. It...