Re: failing to understand/use lambda

On Wed, 25 Jun 2025 11:02:09 +0200, Ralf Fassel wrote:

* Mark Summerfield <m.n.summerfield@gmail.com>
| oo::define Store method add {args} {
|     puts "action: adding [llength $args] new files"
|     $Reporter "adding [llength $args] new files"
| }
--<snip-snip>--
| Actual output:

>

| action: adding 3 new files
| invalid command name "::apply {message { puts "reporter: $message" }}"
 
Note that I have no experience with lambda(n), but the error message
sounds like you need
 
  {*}$Reporter "adding ..."
 
when calling the reporter (i.e. expand the command being called).
 
HTH
R'

Fabulous! That's all it took. _And_ I now understand the error message;
Tcl was getting the entire string as the command, but using {*} broke
it down into its constituents.

PS I use the Pan newsreader and ever with wrap off it still messes up
my posts when it comes to code (e.g., seemingly randomly ignoring
newlines).