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How do I call ::std::make_shared on a class with only protected or private constructors?
...er is probably better, and the one I'll likely accept. But I also came up with a method that's uglier, but does still let everything still be inline and doesn't require a derived class:
#include <memory>
#include <string>
class A {
protected:
struct this_is_private;
public:
ex...
Recommended way to insert elements into map [duplicate]
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insert is not a recommended way - it is one of the ways to insert into map. The difference with operator[] is that the insert can tell whether the element is inserted into the map. Also, if your class has no default constructor, you are forced to use insert. ...
How to calculate “time ago” in Java?
...is a feature that allows you to take any Date and print out how "long ago" it was.
30 Answers
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Cast to int vs floor
...int will truncate toward zero. floor() will truncate toward negative infinite. This will give you different values if bar were negative.
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How to count TRUE values in a logical vector
...icient (look at the code of table function).
Also, you should be careful with the "table" solution, in case there are no TRUE values in the logical vector. Suppose z <- c(NA, FALSE, NA) or simply z <- c(FALSE, FALSE), then table(z)["TRUE"] gives you NA for both cases.
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Is it possible to use 'else' in a list comprehension? [duplicate]
...if b else c is a ternary operator in Python that evaluates to a if the condition b is true - otherwise, it evaluates to c. It can be used in comprehension statements:
>>> [a if a else 2 for a in [0,1,0,3]]
[2, 1, 2, 3]
So for your example,
table = ''.join(chr(index) if index in ords_to_...
How to get a reversed list view on a list in Java?
...list view on a list). Is there some function which provides this functionality?
12 Answers
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How do I horizontally center an absolute positioned element inside a 100% width div? [duplicate]
In the example below, #logo is positioned absolutely and I need it to be horizontally centered within #header . Normally, I would do a margin:0 auto for relatively positioned elements but I am stuck here. Can someone show me the way?
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In Ruby on Rails, how do I format a date with the “th” suffix, as in, “Sun Oct 5th”?
...display dates in the format: short day of week, short month, day of month without leading zero but including "th", "st", "nd", or "rd" suffix.
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IISExpress returns a 503 error from remote machines
I'm attempting to test a website I have running in a local IISExpress instance with some other machines / devices on my local network. I am running Win7 Pro.
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