Length of byte[] array
Use bytes.length without the ()
byte
Java creating byte array whose size is represented by a long
(It is probably a bit late for the OP, but it might still be useful for others) Unfortunately Java does not support arrays with more than 231−1 elements. The maximum consumption is 2 GiB of space for a byte[] array, or 16 GiB of space for a long[] array. While it is probably not applicable … Read more
Why does struct.pack seemingly return “0”?
The output is returned as a byte string, and Python will print such strings as ASCII characters whenever possible: >>> import struct >>> struct.pack(“i”, 34) b'”\x00\x00\x00′ Note the quote at the start, that’s ASCII codepoint 34: >>> ord(‘”‘) 34 >>> hex(ord(‘”‘)) ‘0x22’ >>> struct.pack(“i”, 34)[0] 34 Note that in Python 3, the bytes type is … Read more
Why will byte not take 0xff in java?
The Java byte type is an 8 bit signed integral type with values in the range -128 to +127. The literal 0xff represents +255 which is outside of that range. In the first example, you are attempting to assign a value that is out of range to a byte. That is a compilation error. In … Read more
How do you convert a hexadecimal of type string to number in JS?
You can use the Number function, which parses a string into a number according to a certain format. console.log(Number(“0xdc”)); JavaScript uses some notation to recognize numbers format like – 0x = Hexadecimal 0b = Binary 0o = Octal
Creating Byte[] in PowerShell
This answer is for the question with no context. I’m adding it because of search results. [System.Byte[]]::CreateInstance([System.Byte],<Length>)
C# int byte conversion [duplicate]
Surprisingly, when you perform operations on bytes the computations will be done using int values, with the bytes implicitly cast to (int) first. This is true for shorts as well, and similarly floats are up-converted to double when doing floating-point arithmetic. The second snippet is equivalent to: byte someVar; someVar = (int) someVar – 3; … Read more
Python: Extracting bits from a byte
The classic approach of checking whether a bit is set, is to use binary “and” operator, i.e. x = 10 # 1010 in binary if x & 0b10: # explicitly: x & 0b0010 != 0 print(‘First bit is set’) To check, whether n^th bit is set, use the power of two, or better bit shifting … Read more
How to make a bytes object from a list of integers in Python 3
Just call the bytes constructor. As the docs say: … constructor arguments are interpreted as for bytearray(). And if you follow that link: If it is an iterable, it must be an iterable of integers in the range 0 <= x < 256, which are used as the initial contents of the array. So: >>> … Read more
Determine number of Bytes in ByteBuffer
After you’ve written to the ByteBuffer, the number of bytes you’ve written can be found with the position() method. If you then flip() the buffer, the number of bytes in the buffer can be found with the limit() or remaining() methods. If you then read some of the buffer, the number of bytes remaining can … Read more