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How do I restart nginx only after the configuration test was successful on Ubuntu?
...ginx 1.4.2 I found pkill -1 nginx (effectively what my init.d/nginx reload does) does NOT reload if the config fails and misleadingly returns successful. Check your own versions.
– KCD
Feb 13 '14 at 2:48
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How to exit if a command failed?
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It does appear to be "reversed". If a function "succeeds" it returns 0 and if it "fails" it returns non-zero therefore && might be expected to evaluate when the first half returned non-zero. That does not mean the answe...
Volatile vs. Interlocked vs. lock
...ile, this just ensures the two CPUs see the same data at the same time. It doesn't stop them at all from interleaving their reads and write operations which is the problem you are trying to avoid.
Second Best:
lock(this.locker) this.counter++;
This is safe to do (provided you remember to lock ever...
How are “mvn clean package” and “mvn clean install” different?
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@RakeshYadav yes it does
– Daniel Kaplan
Dec 23 '18 at 20:20
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Which would be better for concurrent tasks on node.js? Fibers? Web-workers? or Threads?
... very very different than, for example how Apache Web Server's Prefork mpm does.
For now, let's think that we have just one CPU core and we will develop an application (in Node's way) to do some work. Our job is to process a big file running over its contents byte-by-byte. The best way for our soft...
How do I get a file extension in PHP?
...that and not PHP (I am looking at Pythonistas right now :-)).
In fact, it does exist, but few people know it. Meet pathinfo():
$ext = pathinfo($filename, PATHINFO_EXTENSION);
This is fast and built-in. pathinfo() can give you other information, such as canonical path, depending on the constant y...
switch / pattern matching idea
...mpiler if you do not. While you can rightfully argue that the default case does this, it also is often in practice a run-time exception.
– VoronoiPotato
Aug 6 '19 at 15:36
add...
Check if an apt-get package is installed and then install it if it's not on Linux
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@Therealstubot : I'm also using Ubuntu 12.04 and dpkg -s does return 1 on missing packages and 0 otherwise, as it should. How was different on earlier (or recent) versions?
– MestreLion
Dec 28 '15 at 8:20
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PyCharm shows unresolved references error for valid code
...n PyCharm 4.0.x in my case. The fact is if something got screwed up and it does not refresh (sometimes it even shows same interpreter repeated several times in the list) you'll have to delete the files manually... I've even had to remove .idea folders once.
– danius
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GroupBy pandas DataFrame and select most common value
... 7 runs, 100 loops each)
Dealing with Multiple Modes
Series.mode also does a good job when there are multiple modes:
source2 = source.append(
pd.Series({'Country': 'USA', 'City': 'New-York', 'Short name': 'New'}),
ignore_index=True)
# Now `source2` has two modes for the
# ("USA", "Ne...