How do I use the same template to read different buffers?

[r03ert0]

I am using struct to write the header of binary files. If the struct template is Header, is it ok to do:

Header.allocate();
var data1=Header.buffer();

fill data1 with my settings, and then do again

Header.allocate();
var data2=Header.buffer();

to create file number 2?

[xdenser]

There is no sense to call allocate twice on same instance. Reuse old buffer, create new instance, or use _setBuffer method