ArrayBuffer not working with Float64Array Node

Question

I have been trying to get a Float64Array to work with an array buffer but node will just not have it. When I do this....

   var ab = new ArrayBuffer(buffer.length);

   var view = new Uint8Array(ab);

   console.log(view.length);//prints 3204

But when I do this...

var ab = new ArrayBuffer(buffer.length);

var view = new Float64Array(ab);

console.log(view.length);//prints nothing

I have also tried...

var view = new Float64Array(ab,0,buffer.length);

And still doesn't work.

Can anybody shed a light on why I cant access this 64 bit array? The buffer was just read from a file which is meant to be 64 bit array of floating point numbers. I just need to get access to it.

I just tried something like that in Node 0.10.25 and it worked fine. What's the value of buffer.length? (oh; 3200 duhh) — Pointy
– Pointy, Commented Jul 2, 2015 at 16:41
actually the size was 3204 which is what was causing the problem. — Exitos
– Exitos, Commented Jul 2, 2015 at 17:19

Exitos · Accepted Answer · 2015-07-02 17:19:17Z

1

Okay I just realised my unit testing framework was swallowing an exception which told me that the length of the buffer that goes into Float64Array must be a multiple of 8. But the file I am reading obviously has a header or something!

So I adjusted the size and it works.

answered Jul 2, 2015 at 17:19

Exitos

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