What I'm saying is that it is not consistent with the philosophy in
Rebol. Datasets are not a datatype, it is a human convention. Take
note of the help message : arg must be a series. Files are read as
series. But yet difference won't work on them.
Inconsistent.
> Hello,
> The problem is because its data sets not datasets.
> Data sets as in series, see help below.
> Mike.
> help difference
> USAGE:
> DIFFERENCE set1 set2 /case /only
> DESCRIPTION:
> Return the difference of two data sets.
> DIFFERENCE is a native value.
> ARGUMENTS:
> set1 -- First data set (Type: series bitset)
> set2 -- Second data set (Type: series bitset)
> REFINEMENTS:
> /case -- Uses case-sensitive comparison.
> /only -- Only elements of the first that are not in the second.
>>> a: [1 2 3]
> == [1 2 3]
>>> b: [2]
> == [2]
>>> difference a b
> == [1 3]
>>>
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