core::byte_array::ByteArrayTrait

pub trait ByteArrayTrait

### append_byte



Appends a single byte to the end of the `ByteArray`.

#### Signature

```rust
fn append_byte(ref self: ByteArray, byte: u8)

let mut ba = "";
ba.append_byte(0);
assert!(ba == "0");

fn len(self: ByteArray) -> u32

let ba: ByteArray = "byte array";
let len = ba.len();
assert!(len == 10);

fn at(self: ByteArray, index: u32) -> Option

let ba: ByteArray = "byte array";
let byte = ba.at(0).unwrap();
assert!(byte == 98);

fn rev(self: ByteArray) -> ByteArray

let ba: ByteArray = "123";
let rev_ba = ba.rev();
assert!(rev_ba == "321");

fn append_word_rev(ref self: ByteArray, word: felt252, len: u32)

let mut ba: ByteArray = "";
ba.append_word_rev('123', 3);
assert!(ba == "321");