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Diffstat (limited to 'tcl8.6/doc/append.n')
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diff --git a/tcl8.6/doc/append.n b/tcl8.6/doc/append.n new file mode 100644 index 0000000..e3bf224 --- /dev/null +++ b/tcl8.6/doc/append.n @@ -0,0 +1,49 @@ +'\" +'\" Copyright (c) 1993 The Regents of the University of California. +'\" Copyright (c) 1994-1996 Sun Microsystems, Inc. +'\" +'\" See the file "license.terms" for information on usage and redistribution +'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES. +'\" +.TH append n "" Tcl "Tcl Built-In Commands" +.so man.macros +.BS +'\" Note: do not modify the .SH NAME line immediately below! +.SH NAME +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 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, +.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: |