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bytes
A sequence of bytes.
This is conceptually similar to an array of integers between 0
and 255, but represented much more efficiently. You can iterate over it
using a for loop.
You can convert
- a string or an array of integers to bytes with the
bytesconstructor - bytes to a string with the
strconstructor, with UTF-8 encoding - bytes to an array of integers with the
arrayconstructor
When reading data from a file, you can decide whether to load it as a string or as raw bytes.
#bytes((123, 160, 22, 0)) \
#bytes("Hello 😃")
#let data = read(
"rhino.png",
encoding: none,
)
// Magic bytes.
#array(data.slice(0, 4)) \
#str(data.slice(1, 4))
コンストラクタ引数引数は関数への入力値です。関数名の後に括弧で囲んで指定します。
Converts a value to bytes.
- Strings are encoded in UTF-8.
- Arrays of integers between
0and255are converted directly. The dedicated byte representation is much more efficient than the array representation and thus typically used for large byte buffers (e.g. image data).
#bytes("Hello 😃") \
#bytes((123, 160, 22, 0))
bytes()->定義定義これらの関数や型には、関連する定義を持たせることができます。定義にアクセスするには、対象の関数や型の名前を指定した後に、ピリオド区切りで定義名を記述します。
at
atReturns the byte at the specified index. Returns the default value if the index is out of bounds or fails with an error if no default value was specified.
self.at(,any)->anyindex
indexThe index at which to retrieve the byte.
defaultany
defaultA default value to return if the index is out of bounds.
slice
sliceExtracts a subslice of the bytes. Fails with an error if the start or end index is out of bounds.
self.slice(,,)->start
startThe start index (inclusive).
The end index (exclusive). If omitted, the whole slice until the end is extracted.
デフォルト値：none
count
countThe number of items to extract. This is equivalent to passing
start + count as the end position. Mutually exclusive with
end.