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What's the best way to send a signal to all members of a process group?
...ocess group. (This is often the case if the tree is the result of forking from a server start or a shell command line.) You can discover process groups using GNU ps as follows:
ps x -o "%p %r %y %x %c "
If it is a process group you want to kill, just use the kill(1) command but instead of giv...
Why doesn't JavaScript support multithreading?
...ure.
Thread-safety of data is guaranteed because all data communicated to/from the worker is serialized/copied.
For more info, read:
http://www.whatwg.org/specs/web-workers/current-work/
http://ejohn.org/blog/web-workers/
...
In Python, how do I create a string of n characters in one line of code?
...nly one line of code (not counting the import statements and defining n):
from random import choice
from string import ascii_lowercase
n = 10
string_val = "".join(choice(ascii_lowercase) for i in range(n))
share
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Developing cross platform mobile application [closed]
...
My answer here covers some of the technical limitations of cross-platfrom tools but let me expand a bit:
I think that cross-platform tools have historically always been also-rans because such tools have the wrong philosophical focus.
All the selling points for cross-plaform tools are the be...
How to solve javax.net.ssl.SSLHandshakeException Error?
...inventory API to get product list and it works fine. Once I get the result from the web-service and i bind to UI. And also I integrated PayPal with my application for make Express checkout when I make a call for payment I'm facing this error. I use servlet for back-end process. Can any one say how t...
When to use AtomicReference in Java?
...rst need to obtain a lock on that object. This prevents some other thread from coming in during the meantime and changing the value in the middle of the new string concatenation. Then when your thread resumes, you clobber the work of the other thread. But honestly that code will work, it looks cle...
Why use Ruby instead of Smalltalk? [closed]
Ruby is becoming popular , largely from the influence Ruby on Rails, but it feels like it is currently struggling through its adolescence. There are a lot of similarities between Ruby and Smalltalk -- maglev is a testament to that. Despite having a more unusual syntax, Smalltalk has all (if not m...
将Linux代码移植到Windows的简单方法 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
.../* Define if <inttypes.h> exists, doesn‘t clash with <sys/types.h>,
and declares uintmax_t. */
#define HAVE_INTTYPES_H 1
通过分析代码可以发现，代码并不是需要一个完整的inttypes.h文件，而是为了一个uintmax_t的定义。在Visual Stdio的C Library中并没有intt...
windows service vs scheduled task
...recommend you separate out your processing code into a different component from the console app or Windows Service. Then you have the choice, either to call the worker process from a console application and hook it into Windows Scheduler, or use a Windows Service.
You'll find that scheduling a Wind...
iOS 7 parallax effect in my view controller
...p for iOS 7 in Objective-C. I've got a screen in my app with a few buttons and a pretty background image. (It's a simple xib with UIButtons on top of a UIImageView .)
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