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Diffstat (limited to 'doc/append.n')
| -rw-r--r-- | doc/append.n | 33 |
1 files changed, 25 insertions, 8 deletions
diff --git a/doc/append.n b/doc/append.n index 1a28065..4b3cfd0 100644 --- a/doc/append.n +++ b/doc/append.n @@ -5,10 +5,8 @@ '\" See the file "license.terms" for information on usage and redistribution '\" of this file, and for a DISCLAIMER OF ALL WARRANTIES. '\" -'\" RCS: @(#) $Id: append.n,v 1.2 1998/09/14 18:39:51 stanton Exp $ -'\" -.so man.macros .TH append n "" Tcl "Tcl Built-In Commands" +.so man.macros .BS '\" Note: do not modify the .SH NAME line immediately below! .SH NAME @@ -16,17 +14,36 @@ append \- Append to variable .SH SYNOPSIS \fBappend \fIvarName \fR?\fIvalue value value ...\fR? .BE - .SH DESCRIPTION .PP Append all of the \fIvalue\fR arguments to the current value -of variable \fIvarName\fR. If \fIvarName\fR doesn't exist, +of variable \fIvarName\fR. If \fIvarName\fR does not exist, it is given a value equal to the concatenation of all the \fIvalue\fR arguments. +The result of this command is the new value stored in variable +\fIvarName\fR. This command provides an efficient way to build up long variables incrementally. -For example, ``\fBappend a $b\fR'' is much more efficient than -``\fBset a $a$b\fR'' if \fB$a\fR is long. - +For example, +.QW "\fBappend a $b\fR" +is much more efficient than +.QW "\fBset a $a$b\fR" +if \fB$a\fR is long. +.SH EXAMPLE +Building a string of comma-separated numbers piecemeal using a loop. +.PP +.CS +set var 0 +for {set i 1} {$i<=10} {incr i} { + \fBappend\fR var "," $i +} +puts $var +# Prints 0,1,2,3,4,5,6,7,8,9,10 +.CE +.SH "SEE ALSO" +concat(n), lappend(n) .SH KEYWORDS append, variable +'\" Local Variables: +'\" mode: nroff +'\" End: |