How to increase flexibility of #flatten

Ruby
1

I am trying to use flatten to change

#this
=> [ [1, 3], [1, 4], [2, 3], [2, 4], [ [5, 5], [6, 6] ] ]
#to this.
=> [ [1,3], [1,4], [2,3], [2,4], [5,5], [6,6] ]

I’ve tried giving flatten an argument of 1, but it removes dimensions
that I want to remain.

x.flatten(1)
=> [1, 3, 1, 4, 2, 3, 2, 4, [5, 5], [6, 6] ]

is there a way to iterate through that first array to produce the output
I want using flatten?

2

On 5 February 2013 11:03, Tom S. [email protected] wrote:

x.flatten(1)
=> [1, 3, 1, 4, 2, 3, 2, 4, [5, 5], [6, 6] ]

is there a way to iterate through that first array to produce the output
I want using flatten?

Do you want a general solution that will always reduce things down the
the
inner-most array? And is there no limit to how many levels deep those
inner-most arrays will be? If so, you’d probably need a recursive
function
call.

Note that if all the inner-most arrays have exactly two elements, you
can
use:
my_array.flatten.each_slice(2).to_a

(the .to_a is to collapse the Enumerator back to actual data; not really
necessary most of the time)

–
Matthew K., B.Sc (CompSci) (Hons)
http://matthew.kerwin.net.au/
ABN: 59-013-727-651

“You’ll never find a programming language that frees
you from the burden of clarifying your ideas.” - xkcd

3

Nice discussion,would like to participate here.

Thanks

4

Am 05.02.2013 07:52, schrieb Love U Ruby:

Nice discussion,would like to participate here.

Thanks

Then contribute something meaningful.

5

On Tue, Feb 5, 2013 at 7:52 AM, Love U Ruby [email protected]
wrote:

Nice discussion,would like to participate here.

Please go ahead.

Cheers

robert

PS: Please do not use the forum to set your personal reading markers.
If you need those you can always use bookmarks for that.

6

First stab:

def deflate(a)
   a.inject([]){ |c,e| (Array === e ? (Array === e.first ?

c.concat(e)
: c << e) : c << e); c }
end

Doesn’t handle deeper nestings though.