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Node.js buffer write() 方法

❮ Buffer 模块


示例

覆盖现有缓冲区的部分内容

var buf = Buffer.from('abcdef');

buf.write('qq', 2);

console.log(buf.toString());
运行示例 »

定义和用法

write() 方法将指定的字符串写入缓冲区,并在指定位置。


语法

buffer.write(value, start, bytes, encoding);

参数值

参数 描述
value 必需。要插入的字符串
start 可选。从哪里开始写入。默认为 0
bytes 可选。要写入多少字节。默认为缓冲区长度减去起始位置
encoding 可选。value 的编码。默认为 'utf8'

 

技术细节

返回值 一个数字,表示写入的字节数
Node.js 版本 0.1.90

❮ Buffer 模块

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