node.js Stream writable.writableObjectMode用法及代碼示例

Stream模塊中的writable.writableObjectMode屬性用於獲取Writable流的對象模式值。

用法:

writable.writableObjectMode

返回值：如果objectMode設置為true，則返回true，否則返回false。

以下示例說明了Node.js中writable.writableObjectMode屬性的使用：

範例1：

// Node.js program to demonstrate the      
// writable.writableObjectMode Property 
   
// Accessing stream module 
const stream = require('stream'); 
   
// Creating a stream and creating  
// a write function 
const writable = new stream.Writable({ 
   
  // setting value of objectMode 
  objectMode:true, 
   
  // Write function with its  
  // parameters 
  write:function(chunk, encoding, next) { 
  
    // Converting the chunk of 
    // data to string 
    console.log(chunk.toString()); 
    next(); 
  } 
}); 
  
// Writing data 
writable.write('GfG') 
   
// Calling writable.writableObjectMode  
// Property 
writable.writableObjectMode;

輸出：

GfG
true

範例2：

// Node.js program to demonstrate the      
// writable.writableObjectMode Property 
   
// Accessing stream module 
const stream = require('stream'); 
   
// Creating a stream and creating  
// a write function 
const writable = new stream.Writable({ 
   
  // Write function with its  
  // parameters 
  write:function(chunk, encoding, next) { 
   
    // Converting the chunk of 
    // data to string 
    console.log(chunk.toString()); 
    next(); 
  } 
}); 
   
// Writing data 
writable.write('GfG') 
   
// Calling writable.writableObjectMode  
// Property 
writable.writableObjectMode;

輸出

GfG
false

此處，未設置objectMode，因此默認情況下將其設置為false。

參考： https://nodejs.org/api/stream.html#stream_writable_writableobjectmode

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