buf.writeFloatLE(value, offset)


  • value <number> 要写入 buf 的数值。
  • offset <integer> 开始写入的偏移量。必须满足0 <= offset <= buf.length - 4
  • 返回: <integer> offset 加上已写入的字节数。

用指定的字节序格式(writeFloatBE() 写入大端序, writeFloatLE() 写入小端序)将 value 写入到 buf 中指定的 offset 位置。 value 必须是 32 位浮点值。

const buf = Buffer.allocUnsafe(4);

buf.writeFloatBE(0xcafebabe, 0);

console.log(buf);
// 打印: <Buffer 4f 4a fe bb>

buf.writeFloatLE(0xcafebabe, 0);

console.log(buf);
// 打印: <Buffer bb fe 4a 4f>
  • value <number> Number to be written to buf.
  • offset <integer> Number of bytes to skip before starting to write. Must satisfy 0 <= offset <= buf.length - 4.
  • Returns: <integer> offset plus the number of bytes written.

Writes value to buf at the specified offset with specified endian format (writeFloatBE() writes big endian, writeFloatLE() writes little endian). value should be a valid 32-bit float. Behavior is undefined when value is anything other than a 32-bit float.

const buf = Buffer.allocUnsafe(4);

buf.writeFloatBE(0xcafebabe, 0);

console.log(buf);
// Prints: <Buffer 4f 4a fe bb>

buf.writeFloatLE(0xcafebabe, 0);

console.log(buf);
// Prints: <Buffer bb fe 4a 4f>