CMcC 8/7/7 Tcl contains some semantic equivalences such as:
Example:
set abc "123"
set xyz $abcor
set xyz [set abc]
Example:
[replace with example]
Example:
[replace with example]
Example:
set abc $::env(HOME)
or
global env
set abc $env(HOME)
Where ~~ can be read as approximates
Add more if you find them. The hunt is on.
escargo 7/7/7 - Are you looking for examples how these are not equivalent? CMcC I changed it to 'approximates.'
For example, I seem to recall that [eval] does a round of substitution before evaluating its input. (Logically, it would seem to be necessary for [] !~ [eval], otherwise eval is just taking up space.)
And subst takes arguments that allow limitations on the substitutions.
LV I think what is being sought are cases where there is more than one way to do it, as the Perl community says.