egghelp/eggheads community

selecting a random item from an array

2007-11-10T06:22:52-04:00

thanks guys. I had already tried that method before but due to an error later in the script the $tnick wouldn't be picked up (strangely it was when I had set it manually, that's why I didn't figure it at first)

Statistics: Posted by BCyo+8C4 — Sat Nov 10, 2007 6:22 am

selecting a random item from an array

2007-11-09T15:35:47-04:00

a little error there Sir_Fz, forgot the rand...

Code:

set playersList [array names players]set tnick [lindex $playersList [rand [llength $playersList]]]

or in one line:

Code:

set tnick [lindex [array names players] [rand [array names players]]]

Statistics: Posted by r0t3n — Fri Nov 09, 2007 3:35 pm

selecting a random item from an array

2007-11-09T20:15:42-04:00

Code:

set playersList [array names players]set tnick [lindex $playersList [rand [llength $playersList]]]

Edit: Thanks Tosser^^

Statistics: Posted by Sir_Fz — Thu Nov 08, 2007 6:16 pm

selecting a random item from an array

2007-11-08T16:22:45-04:00

In other words, get the array names into a list variable, then pull the random name you want, then use that name to get the data from the array!

Statistics: Posted by rosc2112 — Thu Nov 08, 2007 4:22 pm

selecting a random item from an array

2007-11-08T13:49:49-04:00

seriously, I already played ages with those commands and couldn't figure it out. if you want to help me please do so, but don't make me look like someone who doesn't rtfm!

Statistics: Posted by BCyo+8C4 — Thu Nov 08, 2007 1:49 pm

selecting a random item from an array

2007-11-08T13:39:24-04:00

Have a second look at "array names", and you should see that it returns a list of keys in the array. That on it's own is quite unusable as a command.
But, since you now got a list of names, make use of commands such as lindex to actually select an item from that list...

Statistics: Posted by nml375 — Thu Nov 08, 2007 1:39 pm

selecting a random item from an array

2007-11-08T13:33:56-04:00

I tried various array commands as well, like this one:

Code:

set tnick [[array names $players] [rand [array size $players]]]

I spent about 1,5h trying to figure this out already, the help files don't help me with this anymore. So could you please tell me how to do it?

Statistics: Posted by BCyo+8C4 — Thu Nov 08, 2007 1:33 pm

selecting a random item from an array

2007-11-08T13:10:47-04:00

players is an array, not a flat variable containing a list... big difference there..
The command you need to use with arrays is called array.
llength only operates on lists, same goes for lindex.

Statistics: Posted by nml375 — Thu Nov 08, 2007 1:10 pm

selecting a random item from an array

2007-11-08T12:34:01-04:00

Hi,
I've got an array that's populated using

Code:

set players($nick) 1

, the "1" there is increased depending on certain events later.

Now my problem: I want to select a random item (= nick) from the $players array, but I can't figure out how to do it.

Code:

set tnick [lindex $players [rand [llength $players]]]

just tells me later on that can't read "tnick": no such variable and I have no idea what code I'd have to use instead.

Thx for any help.

PS: I only need a random nick from the array, not the number behind it.

Statistics: Posted by BCyo+8C4 — Thu Nov 08, 2007 12:34 pm