Node.js Stream 可读. readableEnded 属性
原文:https://www . geesforgeks . org/node-js-stream-readableend-property/
可读流中的可读. readableEnded 属性用于检查是否发出了结束事件。
语法:
readable.readableEnded
返回值:如果发出结束事件，则返回真，否则返回假。
下面的例子说明了在 Node.js 中可读. readableEnded 属性的使用:
例 1:
// Node.js program to demonstrate the
// readable.readableEnded Property
// Include fs module
var fs = require("fs");
// Data to be displayed
var data = '';
// Create a readable stream
var readable = fs.createReadStream("input.text");
// Set the encoding to be utf8.
readable.setEncoding('UTF8');
// Handling stream event data and end
readable.on('data', function(chunk) {
data += chunk;
});
// End event
readable.on('end',function() {
console.log(data);
});
// Calling readableEnded property
readable.readableEnded;
输出:
read: hello
true
end!!
例 2:
// Node.js program to demonstrate the
// readable.readableEnded Property
// Include fs module
var fs = require("fs");
// Create a readable stream
var readable = fs.createReadStream("input.text");
// Set the encoding to be utf8.
readable.setEncoding('UTF8');
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 readableEnded property
readable.readableEnded;
输出:
false
read: hello
参考:https://nodejs . org/API/stream . html # stream _ readableended。
版权属于：月萌API www.moonapi.com，转载请注明出处
