Re: upvar and uplevel - help

sundar <user2276@newsgrouper.org.invalid> posted:

But is there a way to make the 'upvar' use any variable (table_data, list_data)
where we don't have to make the required changes at each place where the 'templeat'
is needed?
Any other suggestion to refactor is also most welcome.

Yes, most certainly:

```
proc render {v w} {
    upvar $v _v
    upvar $w _w

    set _v "V 1"
    set _w "W 2"
}

# Before render ...

set v A
set w B

puts "$v -- $w"

render v w  ;# Pass the names, not the values - then we can change the values

puts "$v -- $w"
```

It is a rather silly example, but the secret is that you pass the *name*
of the variables and not the value.