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Why can't (or doesn't) the compiler optimize a predictable addition loop into a multiplication?
...that the address of the array was saved in a register so it could optimize based upon that, but the debugger simply knew the address of a constant. Thus, before a statement MyArray[0] = 4; I could check the adddress of MyArray, and look at that location before and after the statement executed; it w...
PHP: How to generate a random, unique, alphanumeric string for use in a secret link?
... I need to limit the ability of the token to be guessed. Because uniqid is based on the time, and according to php.net "the return value is little different from microtime()", uniqid does not meet the criteria. PHP recommends using openssl_random_pseudo_bytes() instead to generate cryptographically ...
What can MATLAB do that R cannot do? [closed]
...riendly, but it is not better than e.g. ESS for R if you use it on a daily bases.
– Matti Pastell
Apr 6 '10 at 7:19
10
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What differences, if any, between C++03 and C++11 can be detected at run-time?
...;
bool isCpp0x() {
auto x(y);
return (y.z == 1);
}
The following is based on the fact that operator int&& is a conversion function to int&& in C++0x, and a conversion to int followed by logical-and in C++03
struct Y { bool x1, x2; };
struct A {
operator int();
template&l...
How do I get only directories using Get-ChildItem?
...sions less than 3.0:
The FileInfo object returned by Get-ChildItem has a "base" property, PSIsContainer. You want to select only those items.
Get-ChildItem -Recurse | ?{ $_.PSIsContainer }
If you want the raw string names of the directories, you can do
Get-ChildItem -Recurse | ?{ $_.PSIsContain...
What is recursion and when should I use it?
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Recursion is a method of solving problems based on the divide and conquer mentality.
The basic idea is that you take the original problem and divide it into smaller (more easily solved) instances of itself, solve those smaller instances (usually by using the same alg...
How to get the filename without the extension in Java?
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you can also use FilenameUtils.getBasename to go straight from a path string to a filename-without-extension.
– Ian Durkan
Jan 28 '11 at 16:37
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Seedable JavaScript random number generator
...m() function returns a random value between 0 and 1, automatically seeded based on the current time (similar to Java I believe). However, I don't think there's any way to set you own seed for it.
...
setTimeout or setInterval?
..., you should go for a self-adjusting timer (which essentially is a timeout-based timer that constantly adjusts itself for the delay it's created)
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Google Chrome Extensions - Can't load local images with CSS
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One option would be to convert your image to base64:
and then put the data right into your css like:
body { background-image: url(data:image/png;base64,iVB...); }
While this might not be an approach you would want to use when regularly developing a webpage, it is a...