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Is multiplication and division using shift operators in C actually faster?
...n to shift, shift. If you mean to multiply, multiply. Do what is semantically clearest--your coworkers will thank you later. Or, more likely, curse you later if you do otherwise.
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Bash if [ false ] ; returns true
...ce "false" is a non-empty string, the test command always succeeds. To actually run the command, drop the [ command.
if false; then
echo "True"
else
echo "False"
fi
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Shell equality operators (=, ==, -eq)
...nd many other shells) adopted. That's the whole point -- if you have [[ at all, then you can safely assume that all the extensions ksh implemented around it (fnmatch()-style pattern matching, ERE regular expressions with =~, and yes, suppression of string-splitting and filesystem globbing) will be a...
How do I check whether a jQuery element is in the DOM?
...
There is a pure-DOM way to do this, which is syntactically more readable, and I imagine very similar in terms of performance: document.contains($foo[0])
– Joel Cross
Dec 1 '15 at 10:16
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How to get process ID of background process?
...olling terminal. A script will not necessarily have a terminal attached at all so job control will not necessarily be available.
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Differences between git pull origin master & git pull origin/master
... checked-out branch.
git pull origin/master will pull changes from the locally stored branch origin/master and merge that to the local checked-out branch. The origin/master branch is essentially a "cached copy" of what was last pulled from origin, which is why it's called a remote branch in git par...
public friend swap member function
...truct vector
{
void swap(vector&) { /* swap members */ }
};
Naturally, then, our class should too, right? Well, not really. The standard library has all sorts of unnecessary things, and a member swap is one of them. Why? Let's go on.
What we should do is identify what's canonical, and w...
How do I kill all the processes in Mysql “show processlist”?
...I see a lot of processes there, and the "time" column shows big values for all of them.
23 Answers
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Why would you use Expression rather than Func?
...ment and submits it to server (rather than executing the lambda).
Conceptually, Expression<Func<T>> is completely different from Func<T>. Func<T> denotes a delegate which is pretty much a pointer to a method and Expression<Func<T>> denotes a tree data structure f...
How to configure an app to run correctly on a machine with a high DPI setting (e.g. 150%)?
...o far so good!
But instead of rendering the fonts with a higher font size, all texts are just scaled up, too. That of course leads to very blurry text (on all controls like buttons etc.).
...