dear guys,

i am seeking a smart way to do ...

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

especialy, the way hopefully will work safety when the source array's
size is odd or zero.

-- 
<name species-designation="5618" default-lang="ja_JP">SHIGETOMI,Takuhiko</name>
<contact medium="email">tshiget1 / gw.nsw.co.jp</contact>
<location federational-alias="/galaxy/alpha-quadrant/sector-001/earth/">
  /void/3d/universe/milkyway-galaxy/orion's-arm/sol-solar-system/3rd-planet/fareast/jp/tky/
</location>
<hail>resistance is futile.</hail>