buf.slice([start[, end]])

• start <integer> 新的 Buffer 将开始的位置。默认值:0。

  \start <integer> Where the new Buffer will start. Default: 0.

• end <integer> 新的 Buffer 将结束的位置(不包括在内)。默认值:buf.length。

  \end <integer> Where the new Buffer will end (not inclusive). Default: buf.length.

• 返回:<Buffer>

  \Returns: <Buffer>

返回一个新的 Buffer,它引用与原始内存相同的内存,但由 start 和 end 索引进行偏移和裁剪。

\Returns a new Buffer that references the same memory as the original, but offset and cropped by the start and end indexes.

此方法与 Uint8Array.prototype.slice()(Buffer 的超类)不兼容。要复制切片,则使用 Uint8Array.prototype.slice()。

\This method is not compatible with the Uint8Array.prototype.slice(), which is a superclass of Buffer. To copy the slice, use Uint8Array.prototype.slice().

import { Buffer } from 'node:buffer';
const buf = Buffer.from('buffer');
const copiedBuf = Uint8Array.prototype.slice.call(buf);
copiedBuf[0]++;
console.log(copiedBuf.toString());
// Prints: cuffer
console.log(buf.toString());
// Prints: buffer
// With buf.slice(), the original buffer is modified.
const notReallyCopiedBuf = buf.slice();
notReallyCopiedBuf[0]++;
console.log(notReallyCopiedBuf.toString());
// Prints: cuffer
console.log(buf.toString());
// Also prints: cuffer (!)const { Buffer } = require('node:buffer');
const buf = Buffer.from('buffer');
const copiedBuf = Uint8Array.prototype.slice.call(buf);
copiedBuf[0]++;
console.log(copiedBuf.toString());
// Prints: cuffer
console.log(buf.toString());
// Prints: buffer
// With buf.slice(), the original buffer is modified.
const notReallyCopiedBuf = buf.slice();
notReallyCopiedBuf[0]++;
console.log(notReallyCopiedBuf.toString());
// Prints: cuffer
console.log(buf.toString());
// Also prints: cuffer (!)拷贝