Select out of nested list

Question

I have a nested list:

{{{1, 2, 3, 4, 5, 6}}, {{1}, {2, 3, 4, 5, 6}}, {{1, 2}, {3}, {4, 5, 6}}}

and would like to select only those lists out of it with two items in it:

{{{1}, {2, 3, 4, 5, 6}}}

How could this be achieved?

$\begingroup$ Select[lst, Length@# == 2 &] (see Select) $\endgroup$
– kglr
Commented Jun 19, 2017 at 21:49 — kglr, Commented Jun 19, 2017 at 21:49
$\begingroup$ Cases[lst,{_,_}] $\endgroup$
– andre314
Commented Jun 19, 2017 at 21:58 — andre314, Commented Jun 19, 2017 at 21:58
$\begingroup$ Select[EqualTo[2]@*Length][data] $\endgroup$
– Syed
Commented Apr 25 at 17:34 — Syed, Commented Apr 25 at 17:34

e.doroskevic · Accepted Answer · 2017-06-19 22:14:09Z

2

Input

data = {{{1, 2, 3, 4, 5, 6}}, {{1}, {2, 3, 4, 5, 6}}, {{1, 2}, {3}, {4, 5, 6}}};

Select[data, Length @ # == 2 &]

{{{1}, {2, 3, 4, 5, 6}}}

answered Jun 19, 2017 at 22:14

e.doroskevic

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$\begingroup$ thanks! very helpful $\endgroup$
– Wafram
Commented Jul 14, 2017 at 18:46
$\begingroup$ You are welcome :) $\endgroup$
– e.doroskevic
Commented Jul 15, 2017 at 22:33

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