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When to use -retainCount?
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To add to this, any information you could gain from -retainCount can be gotten (with much more detail) from Instruments and its tools.
– Dave DeLong
Jan 8 '11 at 21:45
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Log exception with traceback
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Use logging.exception from within the except: handler/block to log the current exception along with the trace information, prepended with a message.
import logging
LOG_FILENAME = '/tmp/logging_example.out'
logging.basicConfig(filename=LOG_FILENAM...
Including dependencies in a jar with Maven
...gin with the "jar-with-dependencies" descriptor. Here's the relevant chunk from one of our pom.xml's that does this:
<build>
<plugins>
<!-- any other plugins -->
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<execu...
What does the ??!??! operator do in C?
... discussion on the IBM developerworks board seems to support that theory.
From ISO/IEC 9899:1999 §5.2.1.1, footnote 12 (h/t @Random832):
The trigraph sequences enable the input of characters that are not defined in the Invariant Code Set as
described in ISO/IEC 646, which is a subset of the ...
Pretty print in MongoDB shell as default
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Now: how do you print it from external javascript loaded into Mongo? This will not work...
– Witold Kaczurba
May 13 '19 at 6:46
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How to jump to top of browser page
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// When the user scrolls down 20px from the top of the document, show the button
window.onscroll = function() {scrollFunction()};
function scrollFunction() {
if (document.body.scrollTop > 20 || document.documentElement.scrollTop > 20) {
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Why XML-Serializable class need a parameterless constructor
...on, because it means that you cannot have any readonly members initialized from constructor parameters.
In addition to all this, the XmlSerializer class could have been written in such a way as to allow even deserialization of classes without parameterless constructors. All it would take would be ...
How to get domain URL and application name?
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The application name come from getContextPath.
I find this graphic from Agile Software Craftsmanship HttpServletRequest Path Decoding sorts out all the different methods that are available:
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How to convert a Binary String to a base 10 integer in Java
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I needed -1 converted from binary to decimal, i did this. System.out.println((int)Long.parseLong("11111111111111111111111111111111",2));
– Zeus
Feb 28 '19 at 18:36
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How to kill a process running on particular port in Linux?
I tried to close the tomcat using ./shutdown.sh from tomcat /bin directory. But found that the server was not closed properly. And thus I was unable to restart My tomcat is running on port 8080 .
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