method Buffer.fill
Usage in Deno
import { type Buffer } from "node:buffer";
Buffer.fill(): this
Fills buf with the specified value. If the offset and end are not given,
the entire buf will be filled:
import { Buffer } from 'node:buffer';
// Fill a `Buffer` with the ASCII character 'h'.
const b = Buffer.allocUnsafe(50).fill('h');
console.log(b.toString());
// Prints: hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
// Fill a buffer with empty string
const c = Buffer.allocUnsafe(5).fill('');
console.log(c.fill(''));
// Prints: <Buffer 00 00 00 00 00>
value is coerced to a uint32 value if it is not a string, Buffer, or
integer. If the resulting integer is greater than 255 (decimal), buf will be
filled with value & 255.
If the final write of a fill() operation falls on a multi-byte character,
then only the bytes of that character that fit into buf are written:
import { Buffer } from 'node:buffer';
// Fill a `Buffer` with character that takes up two bytes in UTF-8.
console.log(Buffer.allocUnsafe(5).fill('\u0222'));
// Prints: <Buffer c8 a2 c8 a2 c8>
If value contains invalid characters, it is truncated; if no valid
fill data remains, an exception is thrown:
import { Buffer } from 'node:buffer';
const buf = Buffer.allocUnsafe(5);
console.log(buf.fill('a'));
// Prints: <Buffer 61 61 61 61 61>
console.log(buf.fill('aazz', 'hex'));
// Prints: <Buffer aa aa aa aa aa>
console.log(buf.fill('zz', 'hex'));
// Throws an exception.
The value with which to fill buf. Empty value (string, Uint8Array, Buffer) is coerced to 0.
optional
encoding: BufferEncoding = 'utf8'
The encoding for value if value is a string.
this
A reference to buf.