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Pure virtual function with implementation
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It's worth pointing out that making A::f() pure means that B must implement f() (otherwise B would be abstract and uninstantiable). And as @MichaelBurr points out, providing an implementation for A::f() means that B may use it to define f().
– fearle...
What are the minimum margins most printers can handle?
...,25x13: "0 0 595 935" for the one sitting in the next room.
These figures mean "Lower left corner is at (12|12), upper right corner is at (583|923)" (where these figures are measured in points; 72pt == 1inch). Can you see that the first printer does print with a margin of 1/6 inch? -- Can you also ...
What is the >>>= operator in C?
... to '\0', which is a character literal whose numerical value is simply 0.
Meanwhile, 0X.1P1 is a hexadecimal floating point literal equal to 2/16 = 0.125. In any case, being non-zero, it's also true as a boolean, so negating it twice with !! again produces 1. Thus, the whole thing simplifies down...
Appending to an existing string
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You can use << to append to a string in-place.
s = "foo"
old_id = s.object_id
s << "bar"
s #=> "foobar"
s.object_id == old_id #=> true
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improv...
Inserting HTML elements with JavaScript
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Using document fragments is very quick; faster than creating elements outside of the DOM and in certain situations faster than innerHTML.
Even though innerHTML is used within the function, it's all happening outside of the DOM so it's much faster than you'd think...
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Checking images for similarity with OpenCV
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One of the simplest & fastest methods. Proposed decades ago as a means to find picture simmilarities. The idea is that a forest will have a lot of green, and a human face a lot of pink, or whatever. So, if you compare two pictures with forests, you'll get some simmilarity between histogram...
Maven: The packaging for this project did not assign a file to the build artifact
...it talks about:
StarTeamCollisionUtil: The packaging for this project did not assign a file to the build artifact
Try the former and your error might just go away!
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Resource interpreted as Document but transferred with MIME type application/zip
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In your request header, you have sent Content-Type: text/html which means that you'd like to interpret the response as HTML. Now if even server send you PDF files, your browser tries to understand it as HTML. That's the problem. I'm searching to see what the reason could be. :)
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How do I check if a list is empty?
...ff between explicitness and type flexibility. generally, "being explicit" means not doing "magical" things. on the other hand, "duck typing" means working with more general interfaces, rather than explicitly checking for types. so something like if a == [] is forcing a particular type (() == [] i...
Why are these numbers not equal?
...ing point cannot represent decimal fractions exactly in most cases, which means you will frequently find that exact matches fail.
while R lies slightly when you say:
1.1-0.2
#[1] 0.9
0.9
#[1] 0.9
You can find out what it really thinks in decimal:
sprintf("%.54f",1.1-0.2)
#[1] "0.90000000000000...