A very powerful language
"TCL is very powerful, I'm a mastery at basic syntax"
by Jdawg140 March 25, 2008
Tool Command Language, 1988-today. A dynamic programming language for Mac/Unix/Windows computers. It can be considered as merging the heritages of Lisp, C, and Unix shells. With a very simple syntax Tcl makes it possible to implement a number of programming styles: functional, object-oriented, stack-oriented, etc.
proc lrevert list {#-- revert a list in Tcl
set res {}
set n llength $list]
while {$n>0} {lappend res lindex $list incr n -1]]}
return $res
}
% lrevert {foo bar grill} ;# testing Tcl
grill bar foo
by Richard Suchenwirth September 13, 2006
In reference to Gaia Online's MMORPG-- TCL means "Ten CL", the highest level attained in the Beta release of Gaia Online's MMORPG, "zOMG!"
"Oh My God, a TCL killed all the monsters!"
by Cassiopeian September 09, 2009

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