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File input 'accept' attribute - is it useful?
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The accept attribute is incredibly useful. It is a hint to browsers to only show files that are allowed for the current input. While it can typically be overridden by users, it helps narrow down the results for users by default, so they can get exactly what they're lo...
Java: function for arrays like PHP's join()?
I want to join a String[] with a glue string. Is there a function for this?
22 Answers
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Where is svcutil.exe in Windows 7?
...e Microsoft Visual Studio Command Prompt: where svcutil.exe. On my machine it is in: C:\Program Files\Microsoft SDKs\Windows\v6.0A\bin\SvcUtil.exe
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Add spaces before Capital Letters
Given the string "ThisStringHasNoSpacesButItDoesHaveCapitals" what is the best way to add spaces before the capital letters. So the end string would be "This String Has No Spaces But It Does Have Capitals"
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Take a full page screenshot with Firefox on the command-line
... Tools > Web Developer > Developer Toolbar to open a command line. Write:
screenshot
and press Enter in order to take a screenshot.
To fully answer the question, you can even save the whole page, not only the visible part of it:
screenshot --fullpage
And to copy the screenshot to clipbo...
VS2013 permanent CPU usage even though in idle mode
...takes CPU usage to 25% (on a 4 cores intel i5 cpu) permanently even though it's supposed to be idle. I thought it has some unfinished background processes so I left it running for a while but it keeps using the cpu when it's supposed to be idle.
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JAXB creating context and marshallers cost
The question is a bit theoretical, what is the cost of creating JAXB context, marshaller and unmarshaller?
8 Answers
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Java HashMap performance optimization / alternative
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As many people pointed out the hashCode() method was to blame. It was only generating around 20,000 codes for 26 million distinct objects. That is an average of 1,300 objects per hash bucket = very very bad. However if I turn the two arrays into a number in base 52 I am guaranteed to get...
Why does ContentResolver.requestSync not trigger a sync?
...slide 26. My content provider is working, and my sync works when I trigger it from the Dev Tools Sync Tester application, however when I call ContentResolver.requestSync(account, authority, bundle) from my ContentProvider, my sync is never triggered.
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How does C compute sin() and other math functions?
...e that actually runs when you call sin() on a typical x86-64 Linux system. It is apparently faster than the fsin assembly instruction. Source code: sysdeps/ieee754/dbl-64/s_sin.c, look for __sin (double x).
This code is very complex. No one software algorithm is as fast as possible and also accurat...