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What does PermGen actually stand for?
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PermGen is used by the JVM to hold loaded classes. You can increase it using:
-XX:MaxPermSize=384m
if you're using the Sun JVM or OpenJDK.
So if you get an OutOfMemoryException: PermGen you need to either make PermGen bigger or you might...
How to remove specific elements in a numpy array
...to quote the delete() docs:
"A copy of arr with the elements specified by obj removed. Note that
delete does not occur in-place..."
If the code I post has output, it is the result of running the code.
share
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What is a wrapper class?
...ulates" the functionality of another class or component. These are useful by providing a level of abstraction from the implementation of the underlying class or component; for example, wrapper classes that wrap COM components can manage the process of invoking the COM component without bothering th...
ViewParam vs @ManagedProperty(value = “#{param.id}”)
... if you want the view parameters to survive any validation failures caused by forms enclosed in the view, otherwise you need to manually retain all request parameters for the subsequent requests by <f:param> in the command components.
Example:
<f:metadata>
<f:viewParam id="user_...
wpf: how to show tooltip when button disabled by command?
... imageUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454...
How do I show a marker in Maps launched by geo URI Intent?
...lication where I want to show different locations (one at the time, picked by user input) by launching Google Maps with their specific geo coordinates.
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Getting parts of a URL (Regex)
...already accepts 0 or more, the ? part (0 or 1) is confusing it. I fixed it by changing (.*)? to (.+)?. You could also just remove the ?
– rossipedia
Oct 25 '10 at 22:23
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Why do Java webapps use .do extension? Where did it come from?
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To my knowledge, this convention has been spread by Struts1. The user guide puts it like this:
5.4.2 Configure the ActionServlet Mapping
Note: The material in this section is not specific to Struts. The
configuration of servlet mappings is
defined in the Java ...
What's an appropriate HTTP status code to return by a REST API service for a validation failure?
...e that HTTP 422 has not made it into HTTP 1.1, RFC-7231.
Richardson and Ruby's RESTful Web Services contains a very helpful appendix on when to use the various HTTP response codes. They say:
400 (“Bad Request”)
Importance: High.
This is the generic client-side error status, used when n...
How can I find an element by CSS class with XPath?
...o clean up stray whitespace characters around the class name (as mentioned by @Terry):
//div[contains(concat(' ', normalize-space(@class), ' '), ' Test ')]
Note that in all these versions, the * should best be replaced by whatever element name you actually wish to match, unless you wish to searc...