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Android: How can I get the current foreground activity (from a service)?
...ere a easy way to do that (like the one I suggested above)?
Send a broadcast Intent to the activity -- here is a sample project demonstrating this pattern
Have the activity supply a PendingIntent (e.g., via createPendingResult()) that the service invokes
Have the activity register a callback or l...
How do the likely/unlikely macros in the Linux kernel work and what is their benefit?
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@MichaelFirth "double inversion" !! is equivalent to casting something to a bool. Some people like to write it this way.
– Ben XO
Aug 6 '19 at 13:05
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How can I obtain the element-wise logical NOT of a pandas Series?
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NumPy is slower because it casts the input to boolean values (so None and 0 becomes False and everything else becomes True).
import pandas as pd
import numpy as np
s = pd.Series([True, None, False, True])
np.logical_not(s)
gives you
0 False
1 ...
Difference between method and function in Scala
...(def) m), or by a process called eta-expansion, which is like an automatic cast from method to function.
That is what the specs say, so let me put this up-front: we do not use that terminology! It leads to too much confusion between so-called "function declaration", which is a part of the program (...
App Inventor 2开发计步器与定位器 - App Inventor 2 中文网 - 清泛IT论坛，有思想、有深度
来源：http://www.zsqz.com/chuangke/10r.htm
【学习目标】
1.掌握App Inventor中对调用手机计步器、位置传感器等硬件传感器的应用；
2.了解数据持久化，掌握数据存储等功能的实现；
3.通过编程实践，感受和体验利用手机...
Lua简明教程 - 脚本技术 - 清泛IT论坛，有思想、有深度
这几天系统地学习了一下Lua这个脚本语言，Lua脚本是一个很轻量级的脚本，也是号称性能最高的脚本，用在很多需要性能的地方，比如：游戏脚本，nginx，wireshark的脚本，当你把他的源码下下来编译后，你会发现解释器居然不到2...
C++ valarray vs. vector
...ample. (By the way, if mean is really int, not double, you may need static_cast<double>(mean).)
– musiphil
Mar 27 '13 at 23:12
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How to call any method asynchronously in c#
...t. Have Foo take one input parameter of type object. You'll then have to cast the object to the appropriate type in Foo.
– Denise Skidmore
Mar 2 '17 at 22:50
add a comment
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Is there a way to check if a file is in use?
...which is more typing. If you have a explicit interface you'd also have to cast. Finally you want to dispose ASAP, and the finally logic may have UI or any other long running actions that have little to do with calling IDispose. </rant>
– Spence
Nov 27 '...
Returning a C string from a function
...you about that return line converting a char * to char without an explicit cast.
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