Node.js | Buffer.swap64() Method
The Buffer.swap64() method is an inbuilt application programming interface of class Buffer within Buffer module which is used to swap the buffer byte order in-place. The swapping is performed by interpreting buffer as an array of 64-bit numbers.
Parameters: This method does not accept any parameters.
Return value: It returns the reference to the buffer.
Error thrown: It throws ERR_INVALID_BUFFER_SIZE if length of buffer (buf.length) is not a multiple of 8.
Below examples illustrate the use of Buffer.swap64() Method in Node.js:
<Buffer 07 00 01 01 04 05 04 06> <Buffer 06 04 05 04 01 01 00 07>
Example 2: We will look at error thrown by this method
<Buffer 00 01 02 03 04 05> Entering catch block RangeError [ERR_INVALID_BUFFER_SIZE]: Buffer size must be a multiple of 64-bits at Buffer.swap64 (buffer.js:1059:11) at /home/runner/index.js:14:9 .......
Note: The above program will compile and run by using the
node index.js command.