Node.js buffer copy() Method
Example
Copy one buffer into parts of another buffer:
var buf1 = Buffer.from('abcdefghijkl');
var buf2 = Buffer.from('HELLO');
buf2.copy(buf1, 2);
console.log(buf1.toString());
Run example »
Definition and Usage
The copy() method copies data from one buffer object into another buffer object.
Syntax
buffer.copy(target, targetStart, sourceStart, sourceEnd);
Parameter Values
| Parameter | Description |
|---|---|
| target | Required. The array of buffers to concat |
| targetStart | Optional. A number specifying where to begin copying to. Default 0 |
| sourceStart | Optional. A number specifying where to begin copying from. Default 0 |
| sourceEnd | Optional. A number specifying where to stop copying from. Default end of buffer |
Technical Details
| Return Value: | A number specifying the number of bytes copied |
|---|---|
| Node.js Version: | 0.1.90 |
More Examples
Example
Copy parts of a buffer into parts of another buffer:
var buf1 = Buffer.from('abcdefghijkl');
var buf2 = Buffer.from('HELLO');
buf2.copy(buf1, 2, 0, 2);
console.log(buf1.toString());
Run example »
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