Node.js Stream 可读. readableHighWaterMark 属性
原文:https://www . geesforgeks . org/node-js-stream-readable-high watermark-property/
可读流中的Readable HighWaterMark 属性，用于检查构建可读流时使用的 high watermark 的值。
语法:
readable.readableHighWaterMark
返回值:返回构建可读流时使用的高水位线的值。
以下示例说明了在 Node.js 中使用可读. readablehighwark 属性:
例 1:
// Node.js program to demonstrate the
// readable.readableHighWaterMark 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.readableHighWaterMark
// Property
readable.readableHighWaterMark;
输出:
65536
read: GeeksforGeeks
例 2:
// Node.js program to demonstrate the
// readable.readableHighWaterMark Property
// Accessing stream module
const stream = require('stream');
// Creating a stream and setting the value
// of the highWaterMark
const readable = new stream.Readable({
highWaterMark: 1234
});
// Calling readable.readableHighWaterMark
// Property
readable.readableHighWaterMark;
输出:
1234
参考:https://nodejs . org/API/stream . html # stream _ readablehighwark。
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