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How to activate JMX on my JVM for access with jconsole?

...un.management.jmxremote.ssl=false -Djava.rmi.server.hostname=${DOCKER_HOST_IP} -Dcom.sun.management.jmxremote.port=9999 -Dcom.sun.management.jmxremote.rmi.port=9998 DOCKER_HOST_IP Unlike using jconsole locally, you have to advertise a different IP than you'll probably see from within the containe...
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In C#, how to check if a TCP port is available?

...objects available in the System.Net.NetworkInformation namespace. Use the IPGlobalProperties object to get to an array of TcpConnectionInformation objects, which you can then interrogate about endpoint IP and port. int port = 456; //<--- This is your value bool isAvailable = true; // Eval...
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Writing a compiler in its own language

... assembler. Eventually, you will come to the place where you have to parse strings, specifically escape sequences. You will write code to convert \n to the character with the decimal code 10 (and \r to 13, etc). After that compiler is ready, you will start to reimplement it in C. This process is ca...
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Regular expression that matches valid IPv6 addresses

... Re: other errors... if the user passes in a non-string, TypeError gets eaten. Clearly a list isn't an ipv6, but I'd probably want to have it carp that I was passing in the wrong type. – Gregg Lind Apr 21 '10 at 20:44 ...
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What causes a TCP/IP reset (RST) flag to be sent?

I'm trying to figure out why my app's TCP/IP connection keeps hiccuping every 10 minutes (exactly, within 1-2 seconds). I ran Wireshark and discovered that after 10 minutes of inactivity the other end is sending a packet with the reset (RST) flag set. A google search tells me "the RESET flag signif...
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What is the difference between string primitives and String objects in JavaScript?

...ain type categories, primivites and objects. var s = 'test'; var ss = new String('test'); The single quote/double quote patterns are identical in terms of functionality. That aside, the behaviour you are trying to name is called auto-boxing. So what actually happens is that a primitive is convert...
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ERROR 1130 (HY000): Host '' is not allowed to connect to this MySQL server [duplicate]

...nd 127.0.0.1, you cannot connect from an external source. If you see other IP addresses, but not the one you're connecting from - that's also an indication. You will need to add the IP address of each system that you want to grant access to, and then grant privileges: CREATE USER 'root'@'ip_addres...
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Exposing a port on a live Docker container

...with something running on its port 8000, you can run wget http://container_ip:8000 To get the container's IP address, run the 2 commands: docker ps docker inspect container_name | grep IPAddress Internally, Docker shells out to call iptables when you run an image, so maybe some variation on this w...
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No visible cause for “Unexpected token ILLEGAL”

...rs. It seems the tool uses that character to control word-wrapping on long strings. UPDATE 2013-01-07 After the latest jsfiddle update, it's now showing the character as a red dot like codepen does. Apparently, it's also not inserting U+200B characters on its own anymore, so this problem should be ...
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Why is MySQL's default collation latin1_swedish_ci?

...general_ci. Compared to latin1_general_ci it has support for a variety of extra characters used in European languages. So it’s a best choice if you don’t know what language you will be using, if you are constrained to use only single byte character sets. ...