If String contains

Is there a easy way to make a statement like : If string contains "…" then ?

if stringName:match"whatever you want it to contain" then

I get attempt to call nill at line 11: http://pastebin.com/6UhrxPVG

Because cell1 is not a string

local cell1 = peripheral.wrap("cofh_thermalexpansion_energycell_0")

Does not return a string, but rather a table. Thus you are not calling the string function when you do cell1:match"".

Is there a way to get around this ?

Not entirely sure what you're trying to do there, as you already know what peirpheral is wrapped to cell1, no?

I want it to check if cell1 is the energycell then execute the addBox-stuff else just skip it

if cell1.getEnergyStored then

Should check wether the table the cell is wrapped to, contains an energy cell function. If it does not, it's not an energy cell.

it is quite redundant however, as no other peripheral would have the same name, meaning your wrap would fail anyways if one wasn't connected.

Ahh it works :D/>

But now I get line 10 or 28: attempt to index dependend on which is connected
But is should just skip this part of the code .

Edit: solved the problem by myself. using peripheral.isPresent(peripheral-name)