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Why is the use of alloca() not considered good practice?
... @Sean: Yes, stack overflow risk is the reason given, but that reason is a bit silly. Firstly because (as Vaibhav says) large local arrays cause exactly the same problem, but are not nearly as vilified. Also, recursion can just as easily blow the stack. Sorry but I'm -1ing you to hopefully counter t...
Undefined reference to static constexpr char[]
...o link.
Good news though - this flaw is fixed in C++17! The approach is a bit convoluted though: in C++17, static constexpr member variables are implicitly inline. Having inline applied to variables is a new concept in C++17, but it effectively means that they do not need an explicit definition any...
How many levels of pointers can we have?
...he maximum allowed by the spec (anything else would be vendor-specific.) A bit off the tangent, programmers should (at least in the general case) treat that as their upper limit (unless they have a valid reason to rely on a vendor-specific upper bound)... me thinks.
– luis.espi...
new DateTime() vs default(DateTime)
...ecessarily initialized to their minimum value. They're initialized to all bits being zero. For some types, that's their lowest value, for others, such as numeric types that can be negative, it's no where near their minimum value. And of course, others still won't be comparable and won't have a "m...
Example of UUID generation using Boost in C++
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The answer of Georg Fritzsche is ok but maybe a bit misleading. You should reuse the generator if you need more than one uuid.
Maybe it's clearer this way:
#include <iostream>
#include <boost/uuid/uuid.hpp> // uuid class
#include <boost/uuid/uui...
Make an HTTP request with android
...protocol, but java's native urlconnection is in no way less useful. With a bit of hands-on, its as easy to use as httpclient, and is way more portable
– Nitin Bansal
Aug 8 '12 at 20:19
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What's the idiomatic syntax for prepending to a short python list?
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"Whenever you see it though, it may be time to consider using a collections.deque instead of a list." Why is this?
– ...
Objective-C class -> string like: [NSArray className] -> @“NSArray”
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@MattDiPasquale: NSClassFromString works a bit differently. Since all of the class names exist somewhere in the Objective-C runtime, NSClassFromString takes the string and explores the list of classes maintained by the runtime looking for the class that has the given ...
How do I use sudo to redirect output to a location I don't have permission to write to?
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Clarifying a bit on why the tee option is preferable
Assuming you have appropriate permission to execute the command that creates the output, if you pipe the output of your command to tee, you only need to elevate tee's privledges with s...
Difference between .on('click') vs .click()
... do have the same result, but it also means that using .click() has a tiny bit more overhead - not anything to worry or even think about in most circumstances, but theoretically it might matter in extraordinary circumstances.
EDIT: Finally, note that .on() allows you to bind several events to the s...