CODEWITHSUNDEEP
arraystclglobalenvironment
user1134991
user1134991

Reputation: 3103

Tcl array get does not work with :: in proc

See the Tcl code below:

proc foo {} {
    puts "env get is:[array get ::env "DODA" ]"
}
set env("DODA") bar
foo
exit

I would expect that the output would be
env get is:{DODA bar}
Instead, it returns just empty list for the array get, namely:
env get is:
Any ideas what am I doing wrong? This is Tcl 8.5

Upvotes: 1

Views: 63

Answers (1)

Dinesh
Dinesh

Reputation: 16428

In Tcl, the arrays are associative arrays. With that, the double quotes and braces behave as separate entity when it comes to array's index.

% set user(name) dinesh
dinesh
% set user("name") DINESH
DINESH
% set user({name}) Dinesh
Dinesh
% parray user
user("name") = DINESH
user(name)   = dinesh
user({name}) = Dinesh
% array size user
3

As you can see, the entries name, "name", {name} are different.

Now, in your case, you have created the index "DODA" with double quotes. 

% set env("DODA") bar
bar
% puts "env get is:[array get ::env \"DODA\" ]"
env get is:{"DODA"} bar
%

Or otherwise,

% set env(DODA) bar
bar
% puts "env get is:[array get ::env DODA ]"
env get is:DODA bar
%

Upvotes: 3

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