The Buffer.writeInt32LE() method is used to write specified bytes into the buffer using little-endian format. The value contains a valid signed 32-bit integer. If the value contains other then signed 32-bit integer then its behavior is undefined.
Syntax:
Buffer.writeInt32LE( value, offset )
Parameters: This method accept two parameters as mentioned above and described below:
- value: It is an integer value that represents the value written into the buffer.
- offset: It is an integer value and it represents the number of bytes to skip before starting to write and the value of offset lies within the range 0 to buffer.length – 4. It’s default value is 0.
Return value: It returns the offset plus number of bytes written.
Example 1:
// Node.js program to demonstrate the // Buffer.writeInt32LE() Method // Allocate a buffer const buf = Buffer.allocUnsafe(8); // Write the buffer element in LE format buf.writeInt32LE(0x05060708, 0); // Display the buffer list console.log(buf); // Write the buffer element in LE format buf.writeInt32LE(0x05060708, 4); // Display the buffer list console.log(buf); |
Output:
<Buffer 08 07 06 05 00 00 00 00> <Buffer 08 07 06 05 08 07 06 05>
Example 2:
// Node.js program to demonstrate the // Buffer.writeInt32LE() Method // Allocate a buffer const buf = Buffer.allocUnsafe(8); // Write the buffer element in LE format buf.writeInt32LE(0x12345678, 0); // Display the buffer list console.log(buf); // Write the buffer element in LE format buf.writeInt32LE(0x123456, 4); // Display the buffer list console.log(buf); |
Output:
<Buffer 78 56 34 12 63 65 73 73> <Buffer 78 56 34 12 56 34 12 00>
Note: The above program will compile and run by using the node index.js command.
Reference: https://nodejs.org/api/buffer.html#buffer_buf_writeint32le_value_offset