[ruby-talk:01352] Re: Say Hi

In message "[ruby-talk:01347] Say Hi"
    on 00/02/15, Clemens Hintze <[e-mail]> writes:

|I beg pardon, but I would not like it! I think it is not too good to
|have too multifunctional methods. Every method should has its
|behavior. push and pop are used to handle an Array like a stack not
|for indexing it. shift and unshift do the same but from the opposite
|end. They are not necessarily coming from Perl. Nearly all UNIX shells
|treat them like Perl. I assume Perl has taken that behavior from the
|UNIX shells.

A few months ago, a proposal to make pop(n) to pop out n elements in
array is proposed in Japanese list.  We discussed it, and abandoned
for argument ambiguity.  Ted's proposal confirms it.

|IMHO, it would be better to allow Array::delete_at to receive also
|negative arguments like Array::[]. If it would do, it would really be
|what you want to have.

Array#delete_at accepts negative index already.

  a = [1,2,3]
  a.delete_at(-1)
  p a  # => [1,2]

In development version 1.5, we provide a new method slice/slice! to
remove elements, that accepts same arguments like [], which works just
like:

  def slice!(*args)
    result = self[*args]
    self[*args] = []
    result
  end

  def slice(*args)
    self.dup.slice!(*args)
  end


							matz.