concat man page on SmartOS

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concat(n)		     Tcl Built-In Commands		     concat(n)


       concat - Join lists together

       concat ?arg arg ...?

       This  command  joins  each  of its arguments together with spaces after
       trimming leading and trailing white-space from each of them.  If all of
       the arguments are lists, this has the same effect as concatenating them
       into a single list.  It permits any number of arguments; if no args are
       supplied, the result is an empty string.

       Although	 concat will concatenate lists, flattening them in the process
       (so giving the following interactive session):

	      % concat a b {c d e} {f {g h}}
	      a b c d e f {g h}

       it will also concatenate things that are not lists, as can be seen from
       this session:

	      % concat " a b {c	  " d "	 e} f"
	      a b {c d e} f

       Note also that the concatenation does not remove spaces from the middle
       of values, as can be seen here:

	      % concat "a   b	c" { d e f }
	      a	  b   c d e f

       (i.e., there are three spaces between each of the a, the b and the c).

       append(n), eval(n), join(n)

       concatenate, join, list

Tcl				      8.3			     concat(n)

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