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How do I update a Python package?
I'm running Ubuntu 9:10 and a package called M2Crypto is installed (version is 0.19.1). I need to download, build and install the latest version of the M2Crypto package (0.20.2).
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How do I get the Git commit count?
...):
git rev-list --count <revision>
To get the commit count across all branches:
git rev-list --all --count
I recommend against using this for build identifier, but if you must, it's probably best to use the count for the branch you're building against. That way the same revision will alw...
Python: Ignore 'Incorrect padding' error when base64 decoding
... of which were base64 without padding:
import base64
import re
def decode_base64(data, altchars=b'+/'):
"""Decode base64, padding being optional.
:param data: Base64 data as an ASCII byte string
:returns: The decoded byte string.
"""
data = re.sub(rb'[^a-zA-Z0-9%s]+' % altcha...
Using an if statement to check if a div is empty
...If a container has a very long HTML content?
– techie_28
Jun 17 '16 at 10:07
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App Launcher 应用启动器扩展：用于启动其他应用程序的强大工具，支持独立...
... getNameList 或 getPackageList 函数中列出所有文件，需要 QUERY_ALL_PACKAGES 权限
动机
App Inventor允许使用ActivityStarter组件启动其他活动。不幸的是，启动已安装的应用程序非常麻烦。根据说明，必须下载要启动...
How do I “commit” changes in a git submodule? [duplicate]
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@rogerdpack - you're correct. Submodules usually end up on "no branch". You'll often need to check out some branch before adding/committing to your submodule.
– timdev
Dec 23 '11 at 16:57
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Stack, Static, and Heap in C++
...t understood very well these three concepts. When do I have to use dynamic allocation (in the heap) and what's its real advantage? What are the problems of static and stack? Could I write an entire application without allocating variables in the heap?
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C# Interfaces. Implicit implementation versus Explicit implementation
...ImplementedException();
}
The difference is that implicit implementation allows you to access the interface through the class you created by casting the interface as that class and as the interface itself. Explicit implementation allows you to access the interface only by casting it as the interfa...
How to create a fixed-size array of objects
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Fixed-length arrays are not yet supported. What does that actually mean? Not that you can't create an array of n many things — obviously you can just do let a = [ 1, 2, 3 ] to get an array of three Ints. It means simply that array size is not something that you can declare as type inf...
What is the difference between is_a and instanceof?
...ut PHP versions >= 5.3.9 now accept an optional third boolean argument $allow_string (defaults to false) to allow comparisons of string class names instead:
class MyBaseClass {}
class MyExtendingClass extends MyBaseClass {}
// Original behavior, evaluates to false.
is_a(MyExtendingClass::class,...