From: Robert Klemme <shortcutter@...>
Date: 2009-11-20T22:50:45+09:00
Subject: Re: make an exmpersion simpler

2009/11/20 Tor Erik Linnerud <tel@jklm.no>:
> Michal Burak wrote:
>> i wan add all elements from list1 to list2
>
> That is not what your code does.
>
> This should work:
>
> list2.concat(list1 || [])

Here's a variant which will avoid the creation of the empty array:

list1 and list2.concat list1

I would not explicitly check for empty list.  Array#concat will handle
that efficiently in C code.

Kind regards

robert

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