The use of Variable and $Variable

RouterOS Scripting
1

The use of $ in front of variables is different in different languages.
Some languages just use a $ in front of a variable to denote that it is a variable, e.g. Perl, PHP, etc. You use the $ even when setting a variable, e.g. $var = 1;
In other languages, the $ is in fact a dereference, e.g. in Unix shell. You set a variable using set var=value and you read it using $value. You don’t use set $var=value because that would mean: get the value of var, use that value as a variable name, and set that variable to value.

MikroTik scripting language seems to be in the middle. Its manual clearly says that values are set using the variable name, not $variable:

:set myVar “my value”;
:put $myVar;

However, when using this:

:set $myVar “other value”;

it works the same way! apparently it accepts both forms in this case.

However, when variable is an array, it works only with the $ sign!

:set Array {{});

does nothing. But:

:set $Array ({});

correctly clears the array. similarly, setting an array member value:

set ($Array->“index”) 1;

the $ is required.

I think this is a bug or it is misleading.

2

Works for me:

[admin@r2] > :global Array;
[admin@r2] > :environment print 
Array=[:nothing]

[admin@r2] > :set Array {{}} 
[admin@r2] > :environment print 
Array={{}}
3

What is the meaning of {{}} and is it different from ({}) ?

When I tried it in an interactive usage like that it worked for me as well, but it fails to work in a scheduled script.
Old content of the array keeps re-appearing even after resetting it that way.
But via $Array it works OK!