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➜ MUSHclient
➜ Lua
➜ How do you Get the length of a mixed/vectored table?
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How do you Get the length of a mixed/vectored table?
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| Posted by
| WillFa
USA (525 posts) Bio
|
| Date
| Wed 20 Aug 2008 09:46 PM (UTC) |
| Message
| | Is there a simpler way than looping through the table and counting the keys? I know #Table only returns the contiguous arrayed portion of the table. | | Top |
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| Posted by
| David Haley
USA (3,881 posts) Bio
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| Date
| Reply #1 on Wed 20 Aug 2008 09:48 PM (UTC) |
| Message
| | No, if you mix integer and string keys, there is no way to get the length other than by counting. (Actually, there are some gotchas even if you use only integers, depending on whether or not you have holes and how big they are.) |
David Haley aka Ksilyan
Head Programmer,
Legends of the Darkstone
http://david.the-haleys.org | | Top |
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| Posted by
| WillFa
USA (525 posts) Bio
|
| Date
| Reply #2 on Wed 20 Aug 2008 09:53 PM (UTC) |
| Message
| Yup. I know about the gotchas.
I mainly wanted to know because I was looking for a way to see if the table's empty.
"if next(Table) then ..." solves that problem.
| | Top |
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| Posted by
| David Haley
USA (3,881 posts) Bio
|
| Date
| Reply #3 on Wed 20 Aug 2008 09:59 PM (UTC) |
| Message
| | Ah -- yes :) That's what the Lua people have always said: usually when people want the length, what they really want is to check if the length is zero... |
David Haley aka Ksilyan
Head Programmer,
Legends of the Darkstone
http://david.the-haleys.org | | Top |
|
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