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Why does volatile exist?
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volatile is needed if you are reading from a spot in memory that, say, a completely separate process/device/whatever may write to.
I used to work with dual-port ram in a multiprocessor system in straight C. We used a hardware managed...
How to force a html5 form validation without submitting it via jQuery
I have this form in my app and I will submit it via AJAX, but I want to use HTML5 for client-side validation. So I want to be able to force the form validation, perhaps via jQuery.
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How to have the formatter wrap code with IntelliJ?
... Code Style / Wrapping.
Update: in later versions of IntelliJ, the option is under Settings / Editor / Code Style. And select Wrap when typing reaches right margin.
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GCC -fPIC option
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Position Independent Code means that the generated machine code is not dependent on being located at a specific address in order to work.
E.g. jumps would be generated as relative rather than absolute.
Pseudo-assembly:
PIC: This would work whether the code was at address 100 or 1000
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Immutable class?
How can one make a Java class immutable, what is the need of immutability and is there any advantage to using this?
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How does Duff's device work?
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There are some good explanations elsewhere, but let me give it a try. (This is a lot easier on a whiteboard!) Here's the Wikipedia example with some notations.
Let's say you're copying 20 bytes. The flow control of the program for the first pass is:
int count; // Set to 2...
Escape angle brackets in a Windows command prompt
...ets (< and >) to a file on a Windows machine. Basically what I want to do is the following:
echo some string < with angle > brackets >>myfile.txt
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When should I release objects in -(void)viewDidUnload rather than in -dealloc?
What is the -(void)viewDidUnload is good for?
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JavaScript OR (||) variable assignment explanation
Given this snippet of JavaScript...
12 Answers
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Batch script: how to check for admin rights
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Issues
blak3r / Rushyo's solution works fine for everything except Windows 8. Running AT on Windows 8 results in:
The AT command has been deprecated. Please use schtasks.exe instead.
The request is not supported.
(see sc...