bitarray | Pure Ruby bit array/bitfield implementation | Cryptography library
kandi X-RAY | bitarray Summary
kandi X-RAY | bitarray Summary
A simple, pure-Ruby 'bit field' object. Works well for Bloom filters (the use case for which I originally wrote it). Originally written in 2007 and left without significant update until 2017, it has now been updated to work within a typical, modern Ruby environment while maintaining the same API.
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of bitarray
bitarray Key Features
bitarray Examples and Code Snippets
Lines of Code : 6License : Permissive (MIT License)
Copypublic void insert(T key) {
for (Hash hash : hashFunctions){
int position = hash.compute(key) % bitArray.size();
bitArray.set(position);
}
} Community Discussions
Trending Discussions on bitarray
QUESTION
y install' for lru-dict, since package 'wheel' is not installed.
Using legacy 'setup.py install' for websockets, since package 'wheel' is not installed.
Using legacy 'setup.py install' for bitarray, since package 'wheel' is not installed.
Using legacy 'setup.py install' for cytoolz, since package 'wheel' is not installed.
Using legacy 'setup.py install' for parsimonious, since package 'wheel' is not installed.
Using legacy 'setup.py install' for varint, since package 'wheel' is not installed.
Installing collected packages: cytoolz, six, eth-utils, varint, rlp, pycryptodome, parsimonious, netaddr, multidict, hexbytes, frozenlist, eth-keys, base58, yarl, pyrsistent, multiaddr, eth-rlp, eth-keyfile, eth-abi, bitarray, attrs, async-timeout, aiosignal, websockets, pywin32, protobuf, lru-dict, jsonschema, ipfshttpclient, eth-account, aiohttp, web3
Running setup.py install for cytoolz ... error
ERROR: Command errored out with exit status 1:
command: 'C:\Users\scs\AppData\Local\Programs\Python\Python310\python.exe' -u -c 'import io, os, sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\Users\scs\AppData\Local\Temp\pip-install-1x2juewd\cytoolz_d8cc48a9187a4f34bf96c2d682dda0ae\setup.py'"'"'; file='"'"'C:\Users\scs\AppData\Local\Temp\pip-install-1x2juewd\cytoolz_d8cc48a9187a4f34bf96c2d682dda0ae\setup.py'"'"';f = getattr(tokenize, '"'"'open'"'"', open)(file) if os.path.exists(file) else io.StringIO('"'"'from setuptools import setup; setup()'"'"');code = f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, file, '"'"'exec'"'"'))' install --record 'C:\Users\scs\AppData\Local\Temp\pip-record-9zksksgh\install-record.txt' --single-version-externally-managed --compile --install-headers 'C:\Users\scs\AppData\Local\Programs\Python\Python310\Include\cytoolz'
cwd: C:\Users\scs\AppData\Local\Temp\pip-install-1x2juewd\cytoolz_d8cc48a9187a4f34bf96c2d682dda0ae
Complete output (53 lines):
[1/5] Cythonizing cytoolz/utils.pyx
[2/5] Cythonizing cytoolz/dicttoolz.pyx
[3/5] Cythonizing cytoolz/functoolz.pyx
[4/5] Cythonizing cytoolz/itertoolz.pyx
[5/5] Cythonizing cytoolz/recipes.pyx
running install
running build
running build_py
creating build
creating build\lib.win-amd64-3.10
creating build\lib.win-amd64-3.10\cytoolz
copying cytoolz\compatibility.py -> build\lib.win-amd64-3.10\cytoolz
copying cytoolz_signatures.py -> build\lib.win-amd64-3.10\cytoolz
copying cytoolz_version.py -> build\lib.win-amd64-3.10\cytoolz
copying cytoolz_init_.py -> build\lib.win-amd64-3.10\cytoolz
creating build\lib.win-amd64-3.10\cytoolz\curried
copying cytoolz\curried\exceptions.py -> build\lib.win-amd64-3.10\cytoolz\curried
copying cytoolz\curried\operator.py -> build\lib.win-amd64-3.10\cytoolz\curried
copying cytoolz\curried_init_.py -> build\lib.win-amd64-3.10\cytoolz\curried
copying cytoolz\dicttoolz.pyx -> build\lib.win-amd64-3.10\cytoolz
copying cytoolz\functoolz.pyx -> build\lib.win-amd64-3.10\cytoolz
copying cytoolz\itertoolz.pyx -> build\lib.win-amd64-3.10\cytoolz
copying cytoolz\recipes.pyx -> build\lib.win-amd64-3.10\cytoolz
copying cytoolz\utils.pyx -> build\lib.win-amd64-3.10\cytoolz
copying cytoolz\cpython.pxd -> build\lib.win-amd64-3.10\cytoolz
copying cytoolz\dicttoolz.pxd -> build\lib.win-amd64-3.10\cytoolz
copying cytoolz\functoolz.pxd -> build\lib.win-amd64-3.10\cytoolz
copying cytoolz\itertoolz.pxd -> build\lib.win-amd64-3.10\cytoolz
copying cytoolz\recipes.pxd -> build\lib.win-amd64-3.10\cytoolz
copying cytoolz\utils.pxd -> build\lib.win-amd64-3.10\cytoolz
copying cytoolz_init_.pxd -> build\lib.win-amd64-3.10\cytoolz
creating build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\dev_skip_test.py -> build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\test_compatibility.py -> build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\test_curried.py -> build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\test_curried_toolzlike.py -> build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\test_dev_skip_test.py -> build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\test_dicttoolz.py -> build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\test_docstrings.py -> build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\test_doctests.py -> build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\test_embedded_sigs.py -> build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\test_functoolz.py -> build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\test_inspect_args.py -> build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\test_itertoolz.py -> build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\test_none_safe.py -> build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\test_recipes.py -> build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\test_serialization.py -> build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\test_signatures.py -> build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\test_tlz.py -> build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\test_utils.py -> build\lib.win-amd64-3.10\cytoolz\tests
running build_ext
building 'cytoolz.dicttoolz' extension
error: Microsoft Visual C++ 14.0 or greater is required. Get it with "Microsoft C++ Build Tools": https://visualstudio.microsoft.com/visual-cpp-build-tools/
----------------------------------------
ERROR: Command errored out with exit status 1: 'C:\Users\scs\AppData\Local\Programs\Python\Python310\python.exe' -u -c 'import io, os, sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\Users\scs\AppData\Local\Temp\pip-install-1x2juewd\cytoolz_d8cc48a9187a4f34bf96c2d682dda0ae\setup.py'"'"'; file='"'"'C:\Users\scs\AppData\Local\Temp\pip-install-1x2juewd\cytoolz_d8cc48a9187a4f34bf96c2d682dda0ae\setup.py'"'"';f = getattr(tokenize, '"'"'open'"'"', open)(file) if os.path.exists(file) else io.StringIO('"'"'from setuptools import setup; setup()'"'"');code = f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, file, '"'"'exec'"'"'))' install --record 'C:\Users\scs\AppData\Local\Temp\pip-record-9zksksgh\install-record.txt' --single-version-externally-managed --compile --install-headers 'C:\Users\scs\AppData\Local\Programs\Python\Python310\Include\cytoolz' Check the logs for full command output.
ANSWER
Answered 2021-Nov-11 at 08:51you need to install Microsoft Visual C++ Build Tools. Just install the suggested packages, restart your computer, and try your program again. I can't remember exactly what are the packages to install, but the recommended few should be enough.
QUESTION
I'm trying to install eth-brownie using 'pipx install eth-brownie' but I get an error saying
...ANSWER
Answered 2022-Jan-02 at 09:59I used pip install eth-brownie and it worked fine, I didnt need to downgrade. Im new to this maybe I could be wrong but it worked fine with me.
QUESTION
I have a simple black & white .bmp file and i would like to convert it through C# into a series of 0s and 1s, excluding the file headers and padding. The image is 32x32 pixels and this is what I have tried so far, but i couldn't remove the padding and header informations.
...ANSWER
Answered 2022-Mar-17 at 13:19QUESTION
I am trying to build an app from a python file (Mac OS) using the py2app extension. I have a folder with the python file and the "setup.py" file.
- I first tested the app by running
python setup.py py2app -Ain the terminal and the dist and build folder are successfully created and the app works when launched. - Now when I try to build it non-locally by running the command
python setup.py py2appin the terminal, there are various "WARNING: ImportERROR" messages while building and finally aerror: [Errno 2] No such file or directory: '/opt/anaconda3/lib/python3.8/site-packages/rtree/lib'error.
How can I fix this? I've tried to delete anaconda fully as I don't use it but it seems to still want to run through it. Additionally, I have tried to run the build command using a virtual environment but I end up having even more import errors.
*I Left out a lot of the "skipping" and "warning" lines using "..." for space
ANSWER
Answered 2022-Mar-13 at 16:13The error error: [Errno 2] No such file or directory: '/opt/anaconda3/lib/python3.8/site-packages/rtree/lib' was caused by py2app trying to build the program bundle using a non-existent interpreter. This means that even if you try to uninstall a manager like Anaconda, it still has option logs somewhere on your mac.
The fix:
- Open the terminal and type the command
type -a python.
- You will see similar lines
QUESTION
I can access bitarray bits with slice syntax..
...ANSWER
Answered 2022-Feb-19 at 15:36I'd recommend using typed memoryviews (which lets you access chunks of 8 bits) and then using bitwise-and operations to access those bits. That's definitely the easiest and most "native" way to Cython.
QUESTION
I try to improve basic Sieve of Eratosthenes algorithm by avoiding cross out duplicate multiple of primes, but it turn out to be worse than my expectation
I has implemented two method that return primes in range [2..max)
Basic sieve ...ANSWER
Answered 2022-Feb-17 at 06:21Compare your two loops from the original and improved versions.
Original:
QUESTION
I'm currently trying to install Brownie for Python on my Windows machine using pipx:
pipx install eth-brownie.
When I run this command, there is a "fatal error" message saying:
pip failed to build packages: bitarray cytoolz lru-dict
I also get a "possibly relevant" error message:
Microsoft Visual C++ 14.0 or greater is required. Get it with "Microsoft C++ Build Tools": https://visualstudio.microsoft.com/visual-cpp-build-tools/
I was wondering if anyone knew of a workaround to solve this that did not involve downloading MS Visual Studio. If not, its not a fatal blow to the project I'm working on, I would just like to save storage. Thanks.
...ANSWER
Answered 2021-Dec-22 at 10:42pip failed to build packages: bitarray cytoolz lru-dict
QUESTION
Im trying to pass the result of the bcrypt hashing function into the user model below.
I can't seem be able to wrap my head around how to efficiently resolve this promise.
Heres the code:
...ANSWER
Answered 2021-Dec-14 at 18:37Don't pass a callback to bcrypt.hash and then you can await it.
QUESTION
We have an Expo React Native Project utilizing encryption. Our current encryption is based on SubtleCrypto / Web API [window.subtle.crypto], using AES-GCM 128, now we need to use a library that is universally available on all platforms [Web, iOS and Android], from my previous question, we've found SJCL that supports GCM mode and we can completely replace all the web-only based code BUT the challenge is that we need to ensure that all the current encrypted data is decrypted at this new library too, we have to make it so:
window.crypto.subtle.encrypt [AES-GCM 128] => (a) ---> SJCL.mode.gcm.decrypt(a)
Once we can do that successfully, we can fully replace the library and have universal platform support as well as backwards compatibility.
This means that we cannot change the way encryption is handled at all, as that is the requirement, and we're encrypting it exactly as the code below.
I got a very good lead here by Neneil94 but I'm still facing issues at encoding / formats; and here's the current code:
...ANSWER
Answered 2021-Dec-12 at 11:35There are two problems in your code:
kkeyis the Base64url encoded raw key. This must first be converted to Base64 and then to a bitArray:
QUESTION
Good day
I am getting an error while importing my environment:
...ANSWER
Answered 2021-Dec-03 at 09:22Build tags in you environment.yml are quite strict requirements to satisfy and most often not needed. In your case, changing the yml file to
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Vulnerabilities
No vulnerabilities reported
Install bitarray
On a UNIX-like operating system, using your system’s package manager is easiest. However, the packaged Ruby version may not be the newest one. There is also an installer for Windows. Managers help you to switch between multiple Ruby versions on your system. Installers can be used to install a specific or multiple Ruby versions. Please refer ruby-lang.org for more information.
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