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


NAME concat - Join lists together

SYNOPSIS concat ?arg arg ...? _________________________________________________________________

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 concatenating 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 (so the command: concat a b {c d e} {f {g h}} will return a b c d e f {g h} as its result), it will also concate- nate things that are not lists, and hence the command: concat " a b {c " d " e} f" will return a b {c d e} f as its result.

Note that the concatenation does not remove spaces from the middle of its arguments, so the command: concat "a b c" { d e f } will return a b c d e f (i.e. with three spaces between the a, the b and the c).

SEE ALSO append(n), eval(n)

KEYWORDS concatenate, join, lists

Tcl 8.3 concat(n)