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Quick question about paths and concatenation.

Started by RockLegend2, 22 May 2013 - 06:25 AM

RockLegend2 #1

16 posts

Location Oviedo, Florida

Posted 22 May 2013 - 08:25 AM

Hey, guys.

This ought to be an easy question for a pro.

Can you concatenate a variable with a string to create a path?

Example:
zipcode = 1234
fs.open("disk/" .. zipcode, "r")

Would that work and open "disk/1234"?

H4X0RZ #2

H4X0RZ's profile picture

1583 posts

Location Germany

Posted 22 May 2013 - 08:32 AM

Yes that works with tostring()


local zipcode = 1234 --here is the numeric variable
local file = fs.open("disk"..tostring(zipcode), "r") --tostring converts zipcode into a string

RockLegend2 #3

16 posts

Location Oviedo, Florida

Posted 22 May 2013 - 08:35 AM

Thank you very much.

Kingdaro #4

Kingdaro's profile picture

1688 posts

Location 'MURICA

Posted 22 May 2013 - 12:02 PM

For the record, numbers are automatically converted to strings when concatenated.


local num = 5
local str = 'hello'

print(str .. num) --> hello5
print(num .. num) --> 55

nateracecar5 #5

nateracecar5's profile picture

93 posts

Posted 22 May 2013 - 09:29 PM

Your code worked when you first created it. If not, it is a bug. Like Kingdaro said, numbers are automatically "tostring'ed" if you will when concatenated.