>
> "A Buffer object can also be used with typed arrays. The buffer object is
> cloned to an ArrayBuffer that is used as the backing store for the typed
> array.
>
Not sure if 'cloned' is the most appropriate term here.
var ab = new Uint32Array(new Buffer(16));
>
> and get
> ab.length == 4;
>
> but this is not so
> ab.length is 16
>
> is it a bug? or I get that paragraph wrong?
>
This is not a bug. ab will have the same length as the parameter. You can,
for example, do
ab = new Uint32Array({ length: 100 });
and ab will have a length of 100.
https://www.khronos.org/registry/typedarray/specs/latest/
I think this is the section that you should look for:
TypedArray(type[] array)
Create a new ArrayBuffer with enough bytes to hold array.length elements of
this typed array, then creates a typed array view referring to the full
buffer. The contents of the new view are initialized to the contents of the
given array or typed array, with each element converted to the appropriate
typed array type.
Note that the buffer is not an ArrayBuffer so I think this is the way the
constructor is called. Also note that the elements from the buffer are
converted to the appropriate typed array type. So that's why I think the
array buffer is not really cloned, but rather it is 'transformed' into
another one. ab.buffer clearly gives you a different buffer than the
original array buffer.
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