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minor modification in var.lua

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Posted by Unia_nt   (17 posts)  [Biography] bio
Date Tue 29 Dec 2015 03:48 AM (UTC)
var.xx return a string, when do comparing with a number in lua will lead error, so I changed the return as :

return tonumber(GetVariable (name) ) or GetVariable (name)

in var.lua and fixed the issue.
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Posted by Fiendish   USA  (1,774 posts)  [Biography] bio   Global Moderator
Date Reply #1 on Tue 29 Dec 2015 11:36 AM (UTC)

Amended on Tue 29 Dec 2015 11:38 AM (UTC) by Fiendish

This would unfortunately break compatibility with anything already using the file. If you know the stored value is a number (which you must in order to do your comparison that way), it would be safer to tonumber the value on the outside of the access instead of inside of it.

So like "yournumber == tonumber(var.foo)" instead of "yournumber == var.foo"

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Posted by Nick Gammon   Australia  (21,642 posts)  [Biography] bio   Forum Administrator
Date Reply #2 on Wed 30 Dec 2015 05:00 AM (UTC)
I agree with Fiendish. For example:

print (tonumber (" 42 "))

That prints 42, and discards the spaces. Your change would corrupt existing variables, quite possibly.

- Nick Gammon

www.gammon.com.au, www.mushclient.com
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