方法说明:
进行不同buffer之间的复制替换操作。
从源buffer复制数据 并替换到目标buffer的指定位置。
语法:
buffer.copy(targetBuffer, [targetStart], [sourceStart], [sourceEnd])
接收参数:
targetBuffer 目标buffer,执行复制替换的buffer
targetStart 目标buffer数据替换的起始位置
sourceStart 源buffer数据复制的起始位置
sourceEnd 源buffer数据复制的结束位置
例子:
在该例子中,提取了buf1 16 到 20之间的数据,将数据复制到buf2中,从buf2的 位置8开始替换。
buf1 = new Buffer(26);
buf2 = new Buffer(26);
for (var i = 0 ; i
buf1[i] = i + 97; // 97 is ASCII a
buf2[i] = 33; // ASCII !
}
buf1.copy(buf2, 8, 16, 20);
console.log(buf2.toString('ascii', 0, 25));
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