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Relative imports in Python 2.7
...ly, see the other answers) or simply create a "main script" main.py in the root directory of your project and put all modules to be imported in subdirectories. main.py can then access all modules directly through their package names (= the names of the respective folders they're in).
...
Is it possible to use Java 8 for Android development?
...elect the project in the next window and click Finish
Go to your project's root folder and delete the files gradlew and gradlew.bat. Also delete gradle folder
Switch back to Eclipse and select Project -> Clean menu option. Fill in the form that shows up as follows:
Clean Project Window
Clic...
Two-way encryption: I need to store passwords that can be retrieved
...n specific key can be stored anywhere (in a config file outside of the web-root, in an environmental variable, etc). The user specific one would be stored in a column in the db next to the encrypted password. The user supplied one would not be stored. Then, you'd do something like this:
$key = $...
Creating a Radial Menu in CSS
...t HTML and CSS, no JS, no SVG, no images (other than the background on the root element).
2015 demo
Screenshots
Chrome 43:
Firefox 38:
IE 11:
Code
The HTML is pretty simple. I'm using the checkbox hack to reveal/ hide the menu.
<input type='checkbox' id='t'/>
<label for='t'>...
动态追踪（Dynamic Tracing）技术漫谈 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...我估计这是因为他当时将之应用于多线程的程序，比如 MySQL，而多线程的程序因为线程同步方面的原因，off-CPU 图上会有很多噪音，容易掩盖真正有趣的那些部分。而我应用 off-CPU 火焰图的场景是像 Nginx 这样的单线程程序，所以...
A semantics for Bash scripts?
...(much of the shell's arithmetic syntax semantics comes from C).
The other root of the shell's syntax comes from its upbringing as a mishmash of individual UNIX utilities. Most of what are often builtins in the shell can actually be implemented as external commands. It throws many shell neophytes fo...
What is an intuitive explanation of the Expectation Maximization technique? [closed]
...n.
This is the estimate of the variance, take the positive square
root to find the standard deviation.
"""
variance = np.sum(weight * (data - mean)**2) / np.sum(weight)
return np.sqrt(variance)
# new estimates for standard deviation
blue_std_guess = estimate_std(both_colours, b...
Does PHP have threading?
... folder ([phpDirectory]/ext).
Copy pthreadVC2.dll into [phpDirectory] (the root folder - not the extension folder).
Edit [phpDirectory]/php.ini and insert the following line
extension=php_pthreads.dll
Test it with the script above with some sleep or something right there where the comment is.
An...
Multiple glibc libraries on a single host
..., not all is lost, but it gets trickier. One solution is to set a proper chroot environment for it. Another possibility is to use rtldi and a binary editor.
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What is an existential type?
...ction height which returns the furthest distance from any leaf node to the root node t.
Now, let's turn the above pseudo-code for height into proper Java syntax! (I'll keep on omitting some boilerplate for brevity's sake, such as object-orientation and accessibility modifiers.) I'm going to show t...