Array slice length confusion

[Tim Matthews]

Sorry I misread (lacking sleep). I can just re slice from the slice, 
silly me.

import std.stdio;

void extendSlice(T)(ref T[] slice, uint extendCount)
{
     slice = slice.ptr[0..slice.length+extendCount];
}

void main()
{
     char[] a = "Hello".dup;
     char[] b;
     b = a[1..3]; //b is a view into a
     writeln(a); //(Hello)
     writeln(b); //(el)
     extendSlice(b,1);
     writeln(a); //(Hello)
     writeln(b); //(ell)
}