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How to update Python?
... in the 2.7 root folder it will not delete them ;)
– XXN
Jan 24 '19 at 16:12
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How do you connect to multiple MySQL databases on a single webpage?
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Warning : mysql_xx functions are deprecated since php 5.5 and removed since php 7.0 (see http://php.net/manual/intro.mysql.php), use mysqli_xx functions or see the answer below from @Troelskn
You can make multiple calls to mysql_connect()...
Cassandra port usage - how are the ports used?
...or current versions of Cassandra:
7199 - JMX (was 8080 pre Cassandra 0.8.xx)
7000 - Internode communication (not used if TLS enabled)
7001 - TLS Internode communication (used if TLS enabled)
9160 - Thrift client API
9042 - CQL native transport port
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Virtual Memory Usage from Java under Linux, too much memory used
...M's memory footprint. This might reduce the virtual memory footprint:
-XX:ReservedCodeCacheSize=32m Reserved code cache size (in bytes) - maximum
code cache size. [Solaris 64-bit,
amd64, and -server x86: 48m; in
1.5.0_06 and earlier, Solaris 64-bit and and64: 1024m.]
-XX:MaxPermSize=6...
Colored logcat in android studio by colorpid
...ndroidStudio and copy in
Mac: /Users/.../Library/Preferences/AndroidStudioXX.XX/ Windows: C:\Users....AndroidStudioXX.XX\config\
Then go to logcat in settings and choose the file.
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Backwards migration with Django South
...gration name at the end of the parameters:
./manage.py migrate app-name 00xx-migration-name
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Getting “Skipping JaCoCo execution due to missing execution data file” upon executing JaCoCo
...e the following (again, notice the ${argLine}):
<argLine>-Xmx4096m -XX:MaxPermSize=512M ${itCoverageAgent}</argLine>
to
<argLine>${argLine} -Xmx4096m -XX:MaxPermSize=512M ${itCoverageAgent}</argLine>
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C# How can I check if a URL exists/is valid?
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I would add that some status codes in the 3xx range will actually cause an error to be thrown e.g. 304 Not Modified in which case you should be handling that in your catch block
– RobV
Aug 25 '11 at 8:43
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XMLHttpRequest cannot load file. Cross origin requests are only supported for HTTP
...pen a browser
In the address line type: http://your IP address:port
http://xxx.xxx.x.x:1337 or http://xx.xxx.xxx.xx:8000 for the default
If the server is working, you will see a list of your files in the browser
Click the file you want to serve, and it should display.
More advanced solutions
In...
Why does GCC generate 15-20% faster code if I optimize for size instead of speed?
...ons=16 -falign-loops=16
Long answer:
The code will run slower if:
an XX byte boundary cuts add() in the middle (XX being machine dependent).
if the call to add() has to jump over an XX byte boundary and the target is not aligned.
if add() is not aligned.
if the loop is not aligned.
The firs...