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Multithreading: What is the point of more threads than cores?
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The answer revolves around the purpose of threads, which is parallelism: to run several separate lines of execution at once. In an 'ideal' system, you would have one thread executing per core: no interruption. In reality this isn't the case. Even if you have four cores and four workin...
Why doesn't java.util.Set have get(int index)?
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Actually this is a recurring question when writing JavaEE applications which use Object-Relational Mapping (for example with Hibernate); and from all the people who replied here, Andreas Petersson is the only one who understood t...
The remote end hung up unexpectedly while git cloning
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Quick solution:
With this kind of error, I usually start by raising the postBuffer size by:
git config --global http.postBuffer 524288000
(some comments below report having to double the value):
git config --global http.postBuffer 1048576000
More information:
From...
How to convert a factor to integer\numeric without loss of information?
...nction in your global environment, but you might cause problems if you actually register it as an S3 method.
– Joshua Ulrich
Apr 18 '14 at 12:03
1
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error_log per Virtual Host?
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Depending on your config, you may need to manually create the log file and set the owner/group to the same user/group that Apache is using. Apache won't warn you if it can't write to the log file.
– Ian Dunn
Jun 24 '11 at 23:41
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How to escape @ characters in Subversion managed file names?
... operations, appending the '@' symbol to the end of a file or URL argument allows you to target a specific revision of that file. For example, "svn info test.txt@1234" will give information about test.txt as it existed in revision 1234.
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How to view AndroidManifest.xml from APK file?
...droid apps
How to do this on your Windows System:
Download apktool-install-windows-* file
Download apktool-* file
Unpack both to your Windows directory
Now copy the APK file also in that directory and run the following command in your command prompt:
apktool d HelloWorld.apk ./HelloWorld
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Command to get nth line of STDOUT
...ssage:
ls -l | sed -n -e '2{p;q}'
I've seen that often enough that I usually use the first (which is easier to type, anyway), though ls is not a command that complains when it gets SIGPIPE.
For a range of lines:
ls -l | sed -n 2,4p
For several ranges of lines:
ls -l | sed -n -e 2,4p -e 20,30...
How to find reason of failed Build without any error or warning
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Excellent find Richard - Really useful information when you set both verbosity levels to diagnostic
– Dai Bok
Oct 20 '16 at 8:38
3
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CORS: Cannot use wildcard in Access-Control-Allow-Origin when credentials flag is true
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This is a part of security, you cannot do that. If you want to allow credentials then your Access-Control-Allow-Origin must not use *. You will have to specify the exact protocol + domain + port. For reference see these questions :
Access-Control-Allow-Origin wildcard subdomains, ports...