The Buffer.swap32() 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 32-bit numbers.
Parameters: This method does not accept any parameters.
Return value: It returns a reference to the swapped buffer.
Error thrown: It throws ERR_INVALID_BUFFER_SIZE if length of buffer (buf.length) is not a multiple of 4.
Below examples illustrate the use of Buffer.swap32() Method in Node.js:
<Buffer 07 00 01 01 04 05 04 06> <Buffer 01 01 00 07 06 04 05 04>
Example 2: This example display the error thrown by this method.
<Buffer 00 01> Entering catch block RangeError [ERR_INVALID_BUFFER_SIZE]: Buffer size must be a multiple of 32-bits at Buffer.swap32 (buffer.js:1042:11) at /home/runner/index.js:14:9 ......
Note: The above program will compile and run by using the
node index.js command.