buffer.write()

buf.write(string[, offset[, length]][, encoding])

string <String> Bytes to be written to buffer
offset <Number> Default: 0
length <Number> Default: buffer.length - offset
encoding <String> Default: 'utf8'
Return: <Number> Numbers of bytes written

Writes string to the Buffer at offset using the given encoding. The length parameter is the number of bytes to write. If the Buffer did not contain enough space to fit the entire string, only a partial amount of the string will be written however, it will not write only partially encoded characters.

const buf = Buffer.allocUnsafe(256);
const len = buf.write('\u00bd + \u00bc = \u00be', 0);
console.log(`${len} bytes: ${buf.toString('utf8', 0, len)}`);
  // Prints: 12 bytes: ½ + ¼ = ¾

Links:

https://nodejs.org/dist/latest-v5.x/docs/api/buffer.html#buffer_buf_write_string_offset_length_encoding

doc_Nodejs

2025-01-10 15:47:30

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