当前位置: 首页>>代码示例 >>用法及示例精选 >>正文


node.js Stream readable.readableObjectMode用法及代码示例


Readable Stream中的可读.visibleObjectMode属性,用于检查流的objectMode。

用法:

readable.readableObjectMode

返回值:它返回布尔值。


以下示例说明了Node.js中visible.visibleObjectMode属性的使用:

范例1:

// Node.js program to demonstrate the      
// readable.readableObjectMode Property 
   
// Accessing readable stream module 
const Readable = require('readable-stream').Readable; 
  
// Constructing readable stream and 
// setting the objectMode value 
const readable = Readable({objectMode:true}); 
  
// Defining ._read method 
readable._read = () => {}; 
  
// Instructions for reading data 
readable.on('readable', () => { 
  let chunk; 
  
  // Using while loop and calling 
  // read method with parameter 
  while (null !== (chunk = readable.read(4))) { 
  
    // Displaying the chunk 
    console.log(`read:${chunk}`); 
  } 
}); 
  
// Calling readableObjectMode 
// Property 
readable.readableObjectMode; 
console.log("objectMode is true!!");

输出:

objectMode is true!!

范例2:

// Node.js program to demonstrate the      
// readable.readableObjectMode Property 
   
// Accessing readable stream module 
const Readable = require('readable-stream').Readable; 
  
// Constructing readable stream and 
// setting the objectMode value 
const readable = Readable({objectMode:false}); 
  
// Defining ._read method 
readable._read = () => {}; 
  
// Instructions for reading data 
readable.on('readable', () => { 
  let chunk; 
  
  // Using while loop and calling 
  // read method with parameter 
  while (null !== (chunk = readable.read(4))) { 
  
    // Displaying the chunk 
    console.log(`read:${chunk}`); 
  } 
}); 
  
// Calling readableObjectMode 
// Property 
readable.readableObjectMode; 
console.log("objectMode is false!!");

输出:

objectMode is false!!

参考: https://nodejs.org/api/stream.html#stream_readable_readableobjectmode



相关用法


注:本文由纯净天空筛选整理自nidhi1352singh大神的英文原创作品 Node.js | Stream readable.readableObjectMode Property。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。