buf.writeDoubleLE(value[, offset])
value
<number> 要写入buf
的数字。offset
<integer> 开始写入之前要跳过的字节数。 必须满足0 <= offset <= buf.length - 8
。 默认值:0
。- 返回: <integer>
offset
加上写入的字节数。
将 value
作为小端序写入 buf
中指定的 offset
。
value
必须是 JavaScript 数字
当 value
不是 JavaScript 数字时,则行为未定义。
const buf = Buffer.allocUnsafe(8);
buf.writeDoubleLE(123.456, 0);
console.log(buf);
// 打印: <Buffer 77 be 9f 1a 2f dd 5e 40>
value
<number> Number to be written tobuf
.offset
<integer> Number of bytes to skip before starting to write. Must satisfy0 <= offset <= buf.length - 8
. Default:0
.- Returns: <integer>
offset
plus the number of bytes written.
Writes value
to buf
at the specified offset
as little-endian. The value
must be a JavaScript number. Behavior is undefined when value
is anything
other than a JavaScript number.
const buf = Buffer.allocUnsafe(8);
buf.writeDoubleLE(123.456, 0);
console.log(buf);
// Prints: <Buffer 77 be 9f 1a 2f dd 5e 40>