The v8.Serializer.writeDouble() method is an inbuilt application programming interface of the v8.Serializer module which is used to write a JS number value to the internal buffer. For use inside of custom serializer._writeHostObject().
Syntax:
v8.Serializer.writeDouble( Value );
Parameters: This method accepts single parameter as mentioned above and described below:
- value: It is required parameter, refers to JS number value to be written to the internal buffer.
Return Value: This method does not return anything but writes a JS number value to the internal buffer.
Below examples illustrate the use of v8.Serializer.writeDouble() method in Node.js:
Example 1: Filename: index.js
// Accessing v8 module const v8 = require('v8');
const serializer = new v8.Serializer();
// Calling v8.serializer.writeDouble() serializer.writeDouble(5783.3984); console.log(serializer.releaseBuffer()); |
Run index.js file using the following command:
node index.js
Output:
<Buffer ba da 8a fd 65 97 b6 40>
Example 2: Filename: index.js
// Accessing v8 module const v8 = require('v8');
const serializer = new v8.Serializer();
// Calling v8.serializer.writeRawBytes() console.log(serializer.releaseBuffer()); // User defined Function function writeDoubleData(data) {
serializer.writeDouble(data);
console.log(serializer.releaseBuffer());
} // Function Call writeDoubleData(123.44); |
Run index.js file using the following command:
node index.js
Output:
<Buffer > <Buffer 5c 8f c2 f5 28 dc 5e 40>
Reference: https://nodejs.org/api/v8.html#v8_serializer_writedouble_value