Removing duplicat Component Instances from an array

[ktkoh]

I am having a problem trying to eliminate duplicate Component Instances from an the selection array. If the user selects more than one instance of a component I want to eliminate that from the array before operating on the selection. Suggestions would be appreciated.

Thanks
Keith

[driven]

['a','a','b','c'].uniq
["a", "b", "c"]

doesn't uniq work?

[TIG]

Because each instance has its own unique reference you'll need to use their actual definitions to get a reduced list.
So let's assume iarray is an array of your selected instances [up to you how you compile this...]
Then use something like this...
defns = [] iarray.each{|i| defns << i.definition unless defns.include?(i.definition) }
Now you have an array of all selected definitions named defns !
Process that...

[Dan Rathbun]

Or use Enumerable#grep ...

defns = selection.grep(Sketchup::ComponentInstance){|i| i.definition }.uniq

But, if you've already got the instances filtered then:

defns = iarray.map{|i| i.definition }.uniq

[ktkoh]

Thanks for the help I just got to part of the program where this is needed. I visulized 6 to10 lines of code knowing that unique would work directly.

Keith