• d-bugmail puremagic.com (31/31) Nov 15 2011 http://d.puremagic.com/issues/show_bug.cgi?id=6957

d-bugmail puremagic.com writes:

http://d.puremagic.com/issues/show_bug.cgi?id=6957

           Summary: std.array.removeSlice
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: Phobos
        AssignedTo: nobody puremagic.com
        ReportedBy: bearophile_hugs eml.cc



This is a spin off of bug 6849. 

I suggest to introduce a function std.array.removeSlice (or a similar name).

It is similar to std.algorithm.remove, with some differences:
- It works on dynamic arrays.
- It works in-place, so unlike remove it changes the array "topology".
- it removes a slice, instead one or more indexes (but it's good to have an
overload that remove a single item).


Why it's useful:
- Removing items from dynamic arrays is a common operation.
- The semantics of std.algorithm.remove (that leaves the input array in a wrong
state) is bug prone and surprising for programmers coming from Python and other
languages.
- Removing whole slices is handy and can't be done with a single line of code
because D slice assignments don't support overlapping slices (they use memcpy
instead of memmove).

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