Node.js Stream 可读. readable flow Property
原文:https://www . geesforgeks . org/node-js-stream-readable-flow-property/
可读流中的可读. readable 属性，用于检查流是否处于流动模式。
语法:
readable.readableFlowing
返回值:如果流处于流动模式，则返回真，否则返回假。
下面的例子说明了在 Node.js 中可读. readableflow 属性的使用:
例 1:
// Node.js program to demonstrate the
// readable.readableFlowing Property
// Include fs module
var fs = require("fs");
var data = '';
// Create a readable stream
var readerStream = fs.createReadStream('input.txt');
// Handling data event
readerStream.on('data', function(chunk) {
data += chunk;
});
// Calling readableFlowing property
readerStream.readableFlowing;
输出:
true
例 2:
// Node.js program to demonstrate the
// readable.readableFlowing Property
// Include fs module
const fs = require("fs");
// Constructing readable stream
const readable = fs.createReadStream("input.txt");
// Instructions for reading data
readable.on('readable', () => {
let chunk;
// Using while loop and calling
// read method with parameter
while (null !== (chunk = readable.read())) {
// Displaying the chunk
console.log(`read: ${chunk}`);
}
});
// Calling readable.readableFlowing
// Property
readable.readableFlowing;
输出:
false
参考:https://nodejs . org/API/stream . html # stream _ readable _ flow。
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