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Using comparison operators in Scala's pattern matching system
...t; println("less than ten")
}
Edit: Note that this is more than superficially different to putting an if after the =>, because a pattern won't match if the guard is not true.
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What is the difference between lock and Mutex?
...hine.
bool firstInstance;
Mutex mutex = new Mutex(false, @"Local\DASHBOARD_MAIN_APPLICATION", out firstInstance);
if (!firstInstance)
{
//another copy of this application running
}
else
{
//run main application loop here.
}
// Refer to the mutex down here so garbage collection doesn't chu...
Get the closest number out of an array
...
downside is that it only works if reduce's callback is called from the same scope as the declared vars. Since you can't pass goal to reduce, you must reference it from a global scope.
– 7yl4r
Feb 6 '15 at 15:09
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How to intercept click on link in UITextView?
...View shouldInteractWithURL:(NSURL *)URL inRange:(NSRange)characterRange *NS_DEPRECATED_IOS(7_0, 10_0, "Use textView:shouldInteractWithURL:inRange:forInteractionType: instead");*
to intercept the clicks to links. And this is the best way to do it.
For ios6 and earlier a nice way to do this is to b...
How to send a header using a HTTP request through a curl call?
...
In PHP:
curl_setopt($ch, CURLOPT_HTTPHEADER, array('HeaderName:HeaderValue'));
or you can set multiple:
curl_setopt($ch, CURLOPT_HTTPHEADER, array('HeaderName:HeaderValue', 'HeaderName2:HeaderValue2'));
...
Easiest way to check for an index or a key in an array?
... associative array)
[ ${array[key]+abc} ] && echo "exists"
Basically what ${array[key]+abc} does is
if array[key] is set, return abc
if array[key] is not set, return nothing
References:
See Parameter Expansion in Bash manual and the little note
if the colon is omitted, the ope...
理解和配置 Linux 下的 OOM Killer - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...-vm:47388kB, anon-rss:3744kB, file-rss:80kB
httpd invoked oom-killer: gfp_mask=0x201da, order=0, oom_adj=0, oom_score_adj=0
httpd cpuset=/ mems_allowed=0
Pid: 8911, comm: httpd Not tainted 2.6.32-279.1.1.el6.i686 #1
...
21556 total pagecache pages
21049 pages in swap cache
Swap cache s...
how to rotate a bitmap 90 degrees
...
In case you don't need the original bitmap, call bitmap.recycle() to be certain.
– Nick Bedford
Feb 12 '19 at 10:47
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Numpy: Get random set of rows from 2D array
...st, but this is what works best for me:
A[np.random.choice(A.shape[0], num_rows_2_sample, replace=False)]
change the replace=False to True to get the same thing, but with replacement.
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How can I create a directly-executable cross-platform GUI app using Python?
... list is at http://wiki.python.org/moin/GuiProgramming
Single executable (all platforms)
PyInstaller - the most active(Could also be used with PyQt)
fbs - if you chose Qt above
Single executable (Windows)
py2exe - used to be the most popular
Single executable (Linux)
Freeze - works the sa...