Split a string in two variables

message="/add a_number"

local message = "/add a_number"
local words = {}

for word in message:gmatch('%S+') do
  table.insert(words, word)
  print(word)
end

/add
a_number

local command, args = message:match('/(.-) (.+)')

Eric, on 10 February 2013 - 01:41 PM said:

local command, args = message:match('/(.-) (.+)')

message-size-color

Hello World-5-red

local message, size, color = message:match('/(.+)-(.-)-(.-)')

Eric, on 10 February 2013 - 11:47 PM said:

local message, size, color = message:match('/(.+)-(.-)-(.-)')

local message, size, color = message:match('/(.+)%-(.-)%-(.-)')

Kingdaro, on 10 February 2013 - 12:50 PM said:

You can use gmatch and capture all non-space characters.

local message = "/add a_number"
local words = {}

for word in message:gmatch('%S+') do
  table.insert(words, word)
  print(word)
end

For these purposes, the script prints every word it finds. The output would be this:

/add
a_number

message-size-color

local argv = { ... }
local msg = argv[1]
local Table = {}
local index = 1
local divider = "-"
if msg ~= nil then
  local pos = string.find(msg, divider)

  while pos ~= nil do
	Table[index] = string.sub(msg, 1, pos - 1)..""
	index = index + 1
	msg = string.sub(msg, pos + 1)
	pos = string.find(msg, divider)
  end

  Table[index] = msg

  for i = 1, index do
	print(Table[i])
  end

end

testprog test-1-2-3
testprog test-1-2-3-
testprog -
testprog

local message = "message-size-color"
local words = {}

for word in message:gmatch('[^%-]+') do
  table.insert(words, word)
end

print(words[1]) --> message
print(words[2]) --> size
print(words[3]) --> color

local message, size, color = message:match('(.+)%-(.+)%-(.+)')

Kingdaro, on 11 February 2013 - 11:33 AM said:

OP didn't specifically ask for an easy-to-understand overly-complicated solution, he/she just wanted a valid answer to the problem, and with that in mind, I provided the most efficient solution that would take the least amount of time to type, and probably is most logical.

Djerun, on 11 February 2013 - 01:03 PM said:

what exactly do you think gmatch does behind the scenes?

I think that, behind the scenes, gmatch is written in C (or Java, depending on implementation) and is crazy faster than anything equivalent you could write in Lua without using gmatch.

It's well worth knowing how to use it.

I hate it when people say things like this. It's the same logic as manually maintaining coroutines yourself instead of using the parallel API, because that's what parallel does behind the scenes, but it's there for a reason. Why do in 20 lines what you could do in 3?

Plus, if there's a better solution, fuck all if it's too difficult for you to use. Just learn about it instead of sticking with the same old outdated primitive methods.

for a, b, c, d in string.gmatch("TUFS", "^(%a)(%u)(%x)(%w)$") do print(d, a, c, b) end