The buffer.subarray() method is an inbuilt application programming interface of the buffer module which is used to crop a part of array i.e. create sub-array from an array.
Buffer.subarray( starting_index, ending_index )
Parameters: This method has two parameters as mentioned above and described below:
- starting_index: This parameter specifies an integer value that denotes the starting address of the buffer from where new buffer to start. Its default value is 0.
- ending_index: It specifies an integer value that denotes ending address of the buffer up to which the new buffer to be created. The default value is the length of the buffer.
Return Value: This method returns the cropped array. This buffer points to the same memory but with cropped starting and ending indices. If ending_index in the parameter is greater than buffer length then buffer length is taken as ending index.
Note: If the new buffer is modified then the same will be reflected in the original buffer as they point to the same memory.
Below examples illustrate the use of buffer.subarray() method in Node.js:
Original buffer is: GeeksforGeeks Cropped buffer is: forGe Cropped buffer after modification is: FORGe Original buffer after modification is: GeeksFORGeeks
Original buffer is: GeeksforGeeks Cropped buffer is:eeksforGeek Cropped buffer is: ksfor Cropped buffer is: GeeksforGeeks
Note: The above program will compile and run by using the
node index.js command.