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Re: idea: everything-slices

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Ed Avis
August 20, 2021 05:16
Re: idea: everything-slices
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A new slice syntax should look closely at what Python does.  The start and end are separated by a colon and the range is half-closed, so "start up until end", as commonly used in C-style for-loops and C++ iterators.  Either can be omitted and so an "everything slice" is list[:].

I think the half-closed range is more elegant than Perl's .. giving a fully inclusive range, which then requires the $#a syntax to give one less than the length of @a.  In Perl I guess it would look something like

@array[:3]        # equivalent to @array[0 .. 2]
@array[0:2]      # equivalent to @array[0, 1]
@array[:$len]  # equivalent to @array[0 .. $len - 1]
@array[:]          # equivalent to @array[0 .. $#array]

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