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[QUOTE="Robert Klemme, post: 4411681"]
You should use "push" with "*" over "+=" since it is more efficient.  "+="
creates a new instance before reassigning to that:

"+=":
irb(main):001:0> a=%w{a b c}
["a", "b", "c"]
irb(main):002:0> b=[1,2,3]
[1, 2, 3]
irb(main):003:0> a.__id__
22401168
irb(main):004:0> a += b
["a", "b", "c", 1, 2, 3]
irb(main):005:0> a.__id__
22388400
irb(main):006:0>

"push":
irb(main):011:0> a=%w{a b c}
["a", "b", "c"]
irb(main):012:0> b=[1,2,3]
[1, 2, 3]
irb(main):013:0> a.__id__
22192460
irb(main):014:0> a.push *b
["a", "b", "c", 1, 2, 3]
irb(main):015:0> a.__id__
22192460
irb(main):016:0>

You can do it via push, but you can't with your own implementation of <<
since you would want to do

a << *translate("foo")

which isn't possible to do because it yields a syntax error.

Otherwise you would have to add the logic you mentioned and do a "push *"
for all Enumerables.  This way you can never append an array as such with
this operator other than doing:

a << [[1,2,3]]

which is a bit odd because of the nesting.

Regards

robert
[/QUOTE]

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