Node.js Stream 可写. writable ked 属性
原文:https://www . geesforgeks . org/node-js-stream-writteablecorked-property/
written . writteablecorked 属性是 stream 模块的内置应用编程接口，用于检查需要调用 unlock()函数的次数，以便可以完全取消对 Stream 的锁定。
语法:
writable.writableCorked
返回值:返回一个整数值，表示需要调用 write . un core()的次数。
下面的例子说明了在 Node.js 中可写.可写.可写属性的使用:
例 1:
// Node.js program to demonstrate the
// writable.writableCorked 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();
}
});
// Calling cork function
writable.cork();
// Writing data
writable.write('hi');
// Again calling cork function
writable.cork();
// Again writing some data
writable.write('GFG');
// Calling writable.writableCorked
// Property
writable.writableCorked;
输出:
2
例 2:
// Node.js program to demonstrate the
// writable.writableCorked 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();
}
});
// Calling cork function
writable.cork();
// Writing data
writable.write('hi');
// Calling uncork() function
writable.uncork();
// Again calling cork function
writable.cork();
// Again writing some data
writable.write('GFG');
// Calling writable.writableCorked
// Property
writable.writableCorked;
输出:
hi
1
在上面的例子中，我们已经调用了一次 uncork()函数。因此，为了完全打开流，您只需要调用 unlock()函数一次，因此，输出是一个。
参考:https://nodejs . org/API/stream . html # stream _ writable _ writablecorked
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