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



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NAME
       concat - Join lists together

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

EXAMPLES
       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).

SEE ALSO
       append(n), eval(n), join(n)

KEYWORDS
       concatenate, join, lists



Tcl                                                  8.3                                           concat(n)