Node.js Stream 可读. readableObjectMode 属性
原文:https://www . geesforgeks . org/node-js-stream-readable object mode-property/
可读流中的可读. readableObjectMode 属性，用于检查流的对象模式。
语法:
readable.readableObjectMode
返回值:返回布尔值。
下面的例子说明了在 Node.js 中使用【readable.readableObjectMode 属性:
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!!
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 _ readable object mode
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