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In many applications, it is useful to create a set of identifiers for naming objects in a consistent manner. In most cases, it is sufficient to create such names from two components. The operator mkid is provided for this purpose. Its syntax is:
mkid(u:id,v:id|non-negative integer):id
for example
mkid(a,3) -> a3 mkid(apple,s) -> apples
while mkid(a+b,2) gives an error.
The set statement can be used to give a value to the identifiers created by mkid, for example
set(mkid(a,3),3);
will give a3 the value 2. Similarly, the unset statement can be used to remove the value from these identifiers, for example
unset(mkid(a,3));
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