对象模式

¥Object mode

Node.js API 创建的所有流都专门对字符串、<Buffer>、<TypedArray> 和 <DataView> 对象进行操作：

¥All streams created by Node.js APIs operate exclusively on strings, <Buffer>, <TypedArray> and <DataView> objects:

• Strings 和 Buffers 是流中最常用的类型。

  ¥Strings and Buffers are the most common types used with streams.

• TypedArray 和 DataView 允许你处理 Int32Array 或 Uint8Array 等类型的二进制数据。当你将 TypedArray 或 DataView 写入流时，Node.js 会处理原始字节。

  ¥TypedArray and DataView lets you handle binary data with types like Int32Array or Uint8Array. When you write a TypedArray or DataView to a stream, Node.js processes the raw bytes.

但是，流的实现可以使用其他类型的 JavaScript 值（除了 null，它在流中具有特殊用途）。这样的流被认为在 "对象模式" 中运行。

¥It is possible, however, for stream implementations to work with other types of JavaScript values (with the exception of null, which serves a special purpose within streams). Such streams are considered to operate in "object mode".

流的实例在创建流时使用 objectMode 选项切换到对象模式。尝试将现有的流切换到对象模式是不安全的。

¥Stream instances are switched into object mode using the objectMode option when the stream is created. Attempting to switch an existing stream into object mode is not safe.