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Posted: **Sat Jul 11, 2015 4:23 pm**

Hi everyone,

I'm sorry if it is a dumb question but in the game I'm making I want to do a level counter but I don't know how to format an int to a string.

Thanks for any advice you have

Posted: **Sat Jul 11, 2015 4:30 pm**

tostring(number)

Posted: **Sat Jul 11, 2015 5:02 pm**

thanks

Posted: **Sat Jul 11, 2015 6:17 pm**

Conversely, you can do tonumber( string ) to check if a string is a valid number; something far better than my previous (and very hack-ish) method:

Code: Select all

function isNumber( str )
    if pcall( function() return str + 0 end ) then
        return str + 0
    end
    return false
end

Posted: **Fri Jul 17, 2015 11:59 pm**

davisdude wrote:-snip-

isnt [manual]tonumber[/manual] far better?

Also 5.3 return ints and floats in different formats when using [manual]tostring[/manual] so you may prefere [manual]string.format[/manual] and some numeral format like %i

Posted: **Sat Jul 18, 2015 12:05 am**

Positive07 wrote:isnt tonumber far better?

davisdude wrote:; something far better than my previous (and very hack-ish) method: -snip-

Posted: **Sat Jul 18, 2015 12:17 am**

Nixola wrote:-snip-

I read the exact opposite, sorry hahaha

Posted: **Sat Jul 18, 2015 9:35 pm**

davisdude wrote:Conversely, you can do tonumber( string ) to check if a string is a valid number; something far better than my previous (and very hack-ish) method:
Code: Select all
function isNumber( str )
    if pcall( function() return str + 0 end ) then
        return str + 0
    end
    return false
end

Hello,

You code is ulgy and be able to break the check with metatable/__add meta handler.

Code: Select all

local hack=10
print(isNumber(hack)) -- print 10, as expected

local hack="hack"
print(isNumber(hack)) -- print false, as expected

local mt = {}
local hack = setmetatable({}, mt)
mt.__add = function() return hack end
mt.__tostring = function() return "p0wn3d" end
print(isNumber(hack)) -- print p0wn3d, instead of false

Posted: **Sat Jul 18, 2015 9:54 pm**

Nixola wrote:
Positive07 wrote:isnt tonumber far better?

davisdude wrote:; something far better than my previous (and very hack-ish) method: -snip-

TsT wrote:You code is ulgy and be able to break the check with metatable/__add meta handler.

Reading is difficult!

Posted: **Sat Jul 18, 2015 10:15 pm**

bartbes wrote:Reading is difficult!

It's the ulgy trooth

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