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Understanding the meaning of the term and the concept - RAII (Resource Acquisition is Initialization
...lue references, a C++0x feature.
// Essentially, a resource is "moved" from one object to another.
FileHandle(FileHandle&& that)
{
file = that.file;
that.file = 0;
}
FileHandle& operator=(FileHandle&& that)
{
file = that.file;
...
Checkout old commit and make it a new commit [duplicate]
...ected), git checkout <commit-hash> . should checkout . (all changes) from the commit to your working-tree, which you can apply as a new commit. You can also detach HEAD and branch off that commit. It should then be at HEAD for the new branch and you can commit there. The . is important.
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Check if a value is an object in JavaScript
...er all there's no recipe at all!) for checking whether it's an object, far from it. Since people tend to look for something to copy from here without doing any research, I'd highly recommend that they turn to the other, most upvoted (and correct!) answer.
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How do I correctly clone a JavaScript object?
... changes to y do not modify x . I realized that copying objects derived from built-in JavaScript objects will result in extra, unwanted properties. This isn't a problem, since I'm copying one of my own literal-constructed objects.
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AngularJS performs an OPTIONS HTTP request for a cross-origin resource
...ates that browsers
"preflight" the request, soliciting supported methods from the server
with an HTTP OPTIONS request header, and then, upon "approval" from
the server, sending the actual request with the actual HTTP request
method. Servers can also notify clients whether "credentials"
(i...
Rename a git submodule
...tree but also updating the "submodule.<submodule name>.path" setting from the .gitmodules file and stage both.
This doesn't happen when no .gitmodules file is found and only issues a warning when it doesn't have a section for this submodule. This is because the user might just use plain gitl...
Is delete this allowed?
... phone call, something takes note of that and creates a phone_call object. From that point onward, the phone_call object handles the details of the phone call (making a connection when you dial, adding an entry to the database to say when the call started, possibly connect more people if you do a co...
Sort a list of tuples by 2nd item (integer value) [duplicate]
...hould be a function that identifies how to retrieve the comparable element from your data structure. In your case, it is the second element of the tuple, so we access [1].
For optimization, see jamylak's response using itemgetter(1), which is essentially a faster version of lambda x: x[1].
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Executing Batch File in C#
...ized as an internal or external command, program or batchfile" (Translated from dutch) Which is odd. Because when i run txtmanipulator from the commandline it executes perfectly.
– Wessel T.
Apr 1 '11 at 22:42
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Are +0 and -0 the same?
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JavaScript uses IEEE 754 standard to represent numbers. From Wikipedia:
Signed zero is zero with an associated sign. In ordinary arithmetic, −0 = +0 = 0. However, in computing, some number representations allow for the existence of two zeros, often denoted by −0 (negative ...