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std::vector versus std::array in C++
...difference between a std::vector and an std::array in C++? When should one be preferred over another? What are the pros and cons of each? All my textbook does is list how they are the same.
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What does mysql error 1025 (HY000): Error on rename of './foo' (errorno: 150) mean?
...ex it. To find that, issue the following select:
SHOW CREATE TABLE region;
This should show you the name of the index, something like this:
CONSTRAINT region_ibfk_1 FOREIGN
KEY (country_id) REFERENCES
country (id) ON DELETE NO
ACTION ON UPDATE NO ACTION
Now simply issue an:
alt...
When to use static vs instantiated classes
...
This is quite an interesting question -- and answers might get interesting too ^^
The simplest way to consider things might be :
use an instanciated class where each object has data on its own (like a user has a name)
use a static class when it's just a too...
How to disable “Save workspace image?” prompt in R?
...ve command line argument when you start R, or you can override the q function:
utils::assignInNamespace(
"q",
function(save = "no", status = 0, runLast = TRUE)
{
.Internal(quit(save, status, runLast))
},
"base"
)
Put the above code in your .Rprofile so it will be run on startup f...
Why does ConcurrentHashMap prevent null keys and values?
The JavaDoc of ConcurrentHashMap says this:
7 Answers
7
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Get Android Phone Model programmatically
I would like to know if there is a way for reading the Phone Model programmatically in Android.
16 Answers
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What is the difference between atomic / volatile / synchronized?
How do atomic / volatile / synchronized work internally?
7 Answers
7
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Font size in CSS - % or em?
When setting the size of fonts in CSS, should I be using a percent value ( % ) or em ? Can you explain the advantage?
8 An...
Ignore mouse interaction on overlay image
...ant to place a transparent image with a circle and a "handdrawn" text over one of the menu items. If I use absolute positioning to place the overlay image above the menu item, the user will not be able to click the button and the hover effect will not work.
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How to set a stroke-width:1 on only certain sides of SVG shapes?
Setting a stroke-width: 1 on a <rect> element in SVG places a stroke on every side of the rectangle.
3 Answers
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