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Correct use of flush() in JPA/Hibernate
...ethod, but I'm not quite clear when to use it and how to use it correctly. From what I read, my understanding is that the contents of the persistence context will be synchronized with the database, i. e. issuing outstanding statements or refreshing entity data.
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When should I use jQuery's document.ready function?
...an img etc), you will not be able to access it because html is interpreted from top to bottom and your html elements are not present when your jQuery code runs.
To overcome this problem, we place every jQuery/javascript code (which uses DOM) inside $(document).ready function which gets called when ...
How does @synchronized lock/unlock in Objective-C?
...explains it in more detail. This is why you're not seeing the log messages from your NSLock subclass — the object you synchronize on can be anything, not just an NSLock.
Basically, @synchronized (...) is a convenience construct that streamlines your code. Like most simplifying abstractions, it ha...
Make Iframe to fit 100% of container's remaining height
...idth: 100%; and height: 100%; properties, it will span over entire screen. From this point on, you can put <iframe> tag inside it and span it over remaining space (both in width and in height) with simple width: 100%; height: 100%; CSS instruction.
Example code
body {
marg...
How to identify if a webpage is being loaded inside an iframe or directly into the browser window?
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Having a page with an iframe within an iframe, to test from my child iframe if my parent iframe was embeded in the page, I used if (parent === top)
– sglessard
Mar 27 '12 at 14:31
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How do you commit code as a different user?
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Check out the --author option for git commit:
From the man page:
--author=<author>
Override the commit author. Specify an explicit author
using the standard A U Thor <author@example.com> format. Otherwise
<author> is assumed to be a pattern...
Fit cell width to content
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@diEcho I didn't write that part, that was from the example code. Regardless, it is bad practice to use the width attribute on elements. In this quick example, the inline CSS is fine, but it should be abstracted into a file if this was production-level code.
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Android Task Affinity Explanation
...een. Why is the B weather app showing and why didn't it save the settings from level D?
The programmer might be able to alleviate some confusion if Activities B and D were linked in state. That way changes to one changes the other. Each time the user opens up a new weather screen, it secretly op...
what’s the difference between Expires and Cache-Control headers?
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Cache-Control was defined in HTTP/1.1, tells all caching mechanisms from server to client whether they may cache this object. It is measured in seconds: Cache-Control: max-age=3600.
The Expires header field gives the date/time after which the response is considered stale. The Expires value ...
Long vs Integer, long vs int, what to use and when?
...d use long and int, except where you need to make use of methods inherited from Object, such as hashcode. Java.util.collections methods usually use the boxed (Object-wrapped) versions, because they need to work for any Object, and a primitive type, like int or long, is not an Object.
Another differ...