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java get file size efficiently

... Well, I tried to measure it up with the code below: For runs = 1 and iterations = 1 the URL method is fastest most times followed by channel. I run this with some pause fresh about 10 times. So for one time access, using the URL is the fastest way I can think of: LENGTH sum: 10626, per It...
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Switching from zsh to bash on OSX, and back again?

So Im learning to develop in Rails, and have discovered the power of zsh. However, for some of my other tasks, I wish to use normal Bash. Although they are the same, I just feel comfortable with the lay out of bash in some situations. How do I switch back and forth, or turn zsh on and off? Thanks! ...
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Grep and Sed Equivalent for XML Command Line Processing

...a will be in files of single line records like csv. It's really simple to handle this data with grep and sed . But I have to deal with XML often, so I'd really like a way to script access to that XML data via the command line. What are the best tools? ...
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How to use base class's constructors and assignment operator in C++?

I have a class B with a set of constructors and an assignment operator. 5 Answers 5 ...
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JavaScript moving element in the DOM

...ee <div> elements on a page. How can I swap positions of the first and third <div> ? jQuery is fine. 7 Answe...
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Converting RGB to grayscale/intensity

... from RGB to grayscale, it is said that specific weights to channels R, G, and B ought to be applied. These weights are: 0.2989, 0.5870, 0.1140. ...
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Get OS-level system information

... run on many different platforms, but primarily variants of Solaris, Linux and Windows. 16 Answers ...
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How to minify php page html output?

... CSS and Javascript Consider the following link to minify Javascript/CSS files: https://github.com/mrclay/minify HTML Tell Apache to deliver HTML with GZip - this generally reduces the response size by about 70%. (If you use Apach...
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What is the fastest/most efficient way to find the highest set bit (msb) in an integer in C?

If I have some integer n, and I want to know the position of the most significant bit (that is, if the least significant bit is on the right, I want to know the position of the furthest left bit that is a 1), what is the quickest/most efficient method of finding out? ...
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Parse query string in JavaScript [duplicate]

... Here is a fast and easy way of parsing query strings in JavaScript: function getQueryVariable(variable) { var query = window.location.search.substring(1); var vars = query.split('&'); for (var i = 0; i < vars.length; i++...