Node.js, MongoDB, and AngularJS Web Development

Slicing Buffers

Another important aspect of working with buffers is the ability to divide them into slices. A slice is a section of a buffer between a starting index and an ending index. Slicing a buffer allows you to manipulate a specific chunk.

You create slices by using slice([start], [end]), which returns a Buffer object that points to the start index of the original buffer and has a length of end – start. Keep in mind that a slice is different from a copy. If you edit a copy, the original does not change. However, if you edit a slice, the original does change.

The code in Listing 5.4 illustrates using slices. The important thing to note is that when the slice is altered in lines 5 and 6, it also alters the original buffer, as shown in