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Diffstat (limited to 'doc/eval.n')
| -rw-r--r-- | doc/eval.n | 15 |
1 files changed, 14 insertions, 1 deletions
@@ -5,7 +5,7 @@ '\" See the file "license.terms" for information on usage and redistribution '\" of this file, and for a DISCLAIMER OF ALL WARRANTIES. '\" -'\" RCS: @(#) $Id: eval.n,v 1.4 2002/08/28 14:46:50 dkf Exp $ +'\" RCS: @(#) $Id: eval.n,v 1.4.2.1 2004/10/27 09:35:38 dkf Exp $ '\" .so man.macros .TH eval n "" Tcl "Tcl Built-In Commands" @@ -27,6 +27,19 @@ Tcl interpreter recursively, and returns the result of that evaluation (or any error generated by it). Note that the \fBlist\fR command quotes sequences of words in such a way that they are not further expanded by the \fBeval\fR command. +.SH EXAMPLE +This procedure acts in a way that is analogous to the \fBlappend\fR +command, except it inserts the argument values at the start of the +list in the variable: +.CS +proc lprepend {varName args} { + upvar 1 $varName var + # Ensure that the variable exists and contains a list + lappend var + # Now we insert all the arguments in one go + set var [\fBeval\fR [list linsert $var 0] $args] +} +.CE .SH KEYWORDS concatenate, evaluate, script |