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Effects of changing Django's SECRET_KEY
...t key needs to be the same size as the output. The key also needs to be in bits. Each digit in base64 represents 6 bits. So if you had a 50 character password, you would have a 50 x 6 = 300 bit secret key. If you are using SHA256, then you would need a 256 bit key (sha256 uses 256 bits by definition...
How to run a python script from IDLE interactive shell?
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The IDLE shell window is not the same as a terminal shell (e.g. running sh or bash). Rather, it is just like being in the Python interactive interpreter (python -i). The easiest way to run a script in IDLE is to use the Open command from ...
How to write log base(2) in c/c++
... you're looking for an integral result, you can just determine the highest bit set in the value and return its position.
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How to quickly check if folder is empty (.NET)?
...re is the extra fast solution, that I finally implemented. Here I am using WinAPI and functions FindFirstFile, FindNextFile. It allows to avoid enumeration of all items in Folder and stops right after detecting the first object in the Folder. This approach is ~6(!!) times faster, than described abov...
Why do we use Base64?
...encodings were created (e.g. Baudot code) which used a different number of bits per character until eventually ASCII became a standard with 7 bits per character. However most computers store binary data in bytes consisting of 8 bits each so ASCII is unsuitable for tranferring this type of data. Some...
Qt入门教程_详细讲解版 PDF - 文档下载 - 清泛网 - 专注C/C++及内核技术
Qt入门教程_详细讲解版 PDFQt 入门教程全文通过两个实例循序渐进讲述了QT开发的基本过程，通俗易懂，入门必备。全文通过两个实例（Linux环境）循序渐进讲述了QT开发的基本过程，通俗易懂，入门必备。WinXP,Win7,Win8,Win10493K
How to color System.out.println output? [duplicate]
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Note
You may not be able to color Window's cmd prompt, but it should work in many unix (or unix-like) terminals.
Also, note that some terminals simply won't support some (if any) ANSI escape sequences and, especially, 24-bit colors.
Usage
Please refer to t...
How can I multiply and divide using only bit shifting and adding?
How can I multiply and divide using only bit shifting and adding?
14 Answers
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Android adb not found
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On Linux, Android SDK platform-tools package containing adb used to be 32bit. It worked fine on 32bit systems. But on 64bit systems you need to manually install the IA32 library.
For Debian based distributions try this:
sudo apt-get install libc6-i386 lib32stdc++6 lib32gcc1 lib32ncurses5
But s...
printf() formatting for hex
...re's certainly a case to be made for using 16 instead of 12 in portable 64-bit code (but you'd use 8 for 32-bit code).
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