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Significant new inventions in computing since 1980
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Even server-based revision control systems are largely post-1980 developments, and going from just having the current state to having the history of the state as well… that's a colossal and subtle change.
– Donal ...
What is the >>>= operator in C?
...al scientific float notation; one difference is that, with hex floats, the base of the exponential part is 2 instead of 10, so 0x0.1p1 equals 0x0.1 = 1/16 times 2¹ = 2. (In any case, none of that matters here; any non-zero value would work equally well there.)
– Ilmari Karonen...
How do I iterate over an NSArray?
...for OS X 10.6 / iOS 4.0 and above, you also have the option of using block-based APIs to enumerate arrays and other collections:
[array enumerateObjectsUsingBlock:^(id object, NSUInteger idx, BOOL *stop) {
// do something with object
}];
You can also use -enumerateObjectsWithOptions:usingBloc...
Is there any advantage of using map over unordered_map in case of trivial keys?
... typically faster.
One other point: the requirements for hashing and tree-based maps are different. Hashing obviously requires a hash function, and an equality comparison, where ordered maps require a less-than comparison. Of course the hybrid I mentioned requires both. Of course, for the common ca...
Move the most recent commit(s) to a new branch with Git
... in newbranch!
WARNING: With Git version 2.0 and later, if you later git rebase the new branch upon the original (master) branch, you may need an explicit --no-fork-point option during the rebase to avoid losing the carried-over commits. Having branch.autosetuprebase always set makes this more like...
What's the difference between using CGFloat and float?
...by Command-double-clicking on "CGFloat" in Xcode — it will jump to the CGBase.h header where the typedef is defined. The same approach is used for NSInteger and NSUInteger as well.
These types were introduced to make it easier to write code that works on both 32-bit and 64-bit without modificatio...
What does the 'standalone' directive mean in XML?
...antee that the information inside the document can be faithfully retrieved based only on the internal DTD, i.e. the document can "stand alone" with no external references. Validating a standalone document ensures that non-validating processors will have all of the information available to correctly ...
How do I measure time elapsed in Java? [duplicate]
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}
The pointcut definition could be easily adapted to monitor any method based on the class name, the package name, the method name, or any combination of these. Measurement is really a perfect use case for AOP.
share
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What is NODE_ENV and how to use it in Express?
...it can check the value of the environment variable and do different things based on the value. NODE_ENV specifically is used (by convention) to state whether a particular environment is a production or a development environment. A common use-case is running additional debugging or logging code if ru...
How can I handle time zones in my webapp?
...iguously used. This looks like a reference: en.wikipedia.org/wiki/Tz_database From what I can tell a "timezone" is "Area/Location", e.g. "America/New_York". That appears to be geographic which is great because for instance America/Los_Angeles means BOTH PST and PDT depending on whether the globe...