SplitScript reference / String / byteAt

String.byteAt

Method

String.byteAt(byteIndex: u32) -> u8!

Returns the raw UTF-8 byte at an offset.

The index uses the same zero-based byte offsets as byteLength and slice. Every in-range byte is observable, including a continuation byte within a multibyte code point. An out-of-range index returns an error.

Parameters

• byteIndex: The zero-based UTF-8 byte offset.

Effects: allocates

Runtime behavior: available everywhere; synchronous

Examples

Inspect a fixed-format ASCII identifier

let separator = "map_01".byteAt(3) else 0
if separator == 0x5f {
    print("Found the separator")
}