How to use table.sort? - ComputerCraft Forums (archive)

Agent Silence #1

376 posts

Location [string "FindMe"]:23143: bad argument #1 to 'returnPos' (vector expected, got nil)

Posted 17 July 2014 - 01:05 PM

How do you pull up the highest/lowest "Priority" from this table using table.sort?


tasks = {dig = {priority = 100}, mine = {priority = 120, timeout = 10}}

Im really confused, please help

theoriginalbit #2

7508 posts

Location Australia

Posted 17 July 2014 - 01:15 PM

As shown on the Lua-users.org Tables Tutorial you can provide a second argument to table.sort that is a comparator function where you compare the two arguments provided to it, therefore you'd do the following


table.sort( tasks, function( a, b ) return a > b end )

Edited by

Agent Silence #3

376 posts

Location [string "FindMe"]:23143: bad argument #1 to 'returnPos' (vector expected, got nil)

Posted 17 July 2014 - 01:21 PM

theoriginalbit, on 17 July 2014 - 01:15 PM said:
As shown on the Lua-users.org Tables Tutorial you can provide a second argument to table.sort that is a comparator function where you compare the two arguments provided to it, therefore you'd do the following
table.sort( tasks, function( a, b ) return a > b end )

It helps a little, but how would It compare the priorities

theoriginalbit #4

7508 posts

Location Australia

Posted 17 July 2014 - 01:25 PM

well the values passed through in a and b are the table entries, so you simply just do a.priority and b.priority.

Agent Silence #5

376 posts

Location [string "FindMe"]:23143: bad argument #1 to 'returnPos' (vector expected, got nil)

Posted 17 July 2014 - 01:33 PM

theoriginalbit, on 17 July 2014 - 01:25 PM said:
well the values passed through in a and b are the table entries, so you simply just do a.priority and b.priority.

Well that helps alot!, Thank you!

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PM me if you are interested in it

theoriginalbit #6

7508 posts

Location Australia

Posted 17 July 2014 - 01:38 PM

Oh very nice. I look forward to seeing it complete :)/> though you might want to brush up on binary manipulation if you plan on actually saving out into the NBS format.

Edited on 17 July 2014 - 11:38 AM