ls ( -m option )

UNIX Command

$ls
AUTHORS  autom4te.cache  ChangeLog  CVS  cvs.sh  doc  po  README  src  TODO
$ls -m
AUTHORS, autom4te.cache, ChangeLog, CVS, cvs.sh, doc, po, README, src, TODO
$

UNIX Explanation

-m     fill width with a comma separated list of entries

Theory Drop

In computer science,  an array data structure or  simply array is a
data structure  consisting of a  collection of elements  (values or
variables),  each identified  by at  least one  index. An  array is
stored so  that the position of  each element can  be computed from
its index tuple by a mathematical formula.

source : http://en.wikipedia.org/wiki/Array_data_structure

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