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How to take a screenshot programmatically on iOS
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Considering a check for retina display use the following code snippet:
#import <QuartzCore/QuartzCore.h>
if ([[UIScreen mainScreen] respondsToSelector:@selector(scale)]) {
UIGraphicsBeginImageContextWithOptions(self.window.bounds.siz...
SVN 405 Method Not Allowed
...rver copy. I can do updates and commits without problems on any other file or folder, but if I try to create a folder with the same name, add, and commit, it gives me the following error:
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When to use RSpec let()?
I tend to use before blocks to set instance variables. I then use those variables across my examples. I recently came upon let() . According to RSpec docs, it is used to
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How can I get sin, cos, and tan to use degrees instead of radians?
When I'm working with math in JS I would like its trig functions to use degree values instead of radian values. How would I do that?
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Normalization in DOM parsing with java - how does it work?
I saw the line below in code for a DOM parser at this tutorial .
3 Answers
3
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Ukkonen's suffix tree algorithm in plain English
...ffix Trees , but he glosses over various points and some aspects of the algorithm remain unclear.
7 Answers
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Difference between @Before, @BeforeClass, @BeforeEach and @BeforeAll
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The code marked @Before is executed before each test, while @BeforeClass runs once before the entire test fixture. If your test class has ten tests, @Before code will be executed ten times, but @BeforeClass will be executed only once.
In genera...
std::unique_ptr with an incomplete type won't compile
...truction.
If you use pimpl with unique_ptr, you need to declare a destructor:
class foo
{
class impl;
std::unique_ptr<impl> impl_;
public:
foo(); // You may need a def. constructor to be defined elsewhere
~foo(); // Implement (with {}, or with = default;) where impl is com...
Why are function pointers and data pointers incompatible in C/C++?
... read that converting a function pointer to a data pointer and vice versa works on most platforms but is not guaranteed to work. Why is this the case? Shouldn't both be simply addresses into main memory and therefore be compatible?
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How to instantiate non static inner class within a static method?
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For static inner, can't you just simply do Inner inner = new Inner() ?
– Can Lu
May 20 '14 at 8:29
1
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