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What is the difference between == and Equals() for primitives in C#?
Consider this code:
9 Answers
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Detect if an input has text in it using CSS — on a page I am visiting and do not control?
Is there a way to detect whether or not an input has text in it via CSS? I've tried using the :empty pseudo-class, and I've tried using [value=""] , neither of which worked. I can't seem to find a single solution to this.
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How do I detect whether a Python variable is a function?
I have a variable, x , and I want to know whether it is pointing to a function or not.
25 Answers
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When should I use the new keyword in C++?
...hod 1 (using new)
Allocates memory for the object on the free store (This is frequently the same thing as the heap)
Requires you to explicitly delete your object later. (If you don't delete it, you could create a memory leak)
Memory stays allocated until you delete it. (i.e. you could return a...
NOT IN vs NOT EXISTS
Which of these queries is the faster?
11 Answers
11
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When should I use a NoSQL database instead of a relational database? Is it okay to use both on the s
... have terabytes of data stored in big data centers. Querying and inserting is not performant in these scenarios because of the blocking/schema/transaction nature of the RDBMs. That's the reason they have implemented their own databases (actually, key-value stores) for massive performance gain and ...
Detect if a page has a vertical scrollbar?
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$(document).ready(function() {
// Check if body height is higher than window height :)
if ($("body").height() > $(window).height()) {
alert("Vertical Scrollbar! D:");
}
// Check if body width is higher than window width :)
if ($("body").width() > $(...
Why do we use Base64?
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Your first mistake is thinking that ASCII encoding and Base64 encoding are interchangeable. They are not. They are used for different purposes.
When you encode text in ASCII, you start with a text string and convert it to a sequence of...
Why is nginx responding to any domain name?
I have nginx up and running with a Ruby/Sinatra app and all is well. However, I'm now trying to have a second application running from the same server and I noticed something weird. First, here's my nginx.conf:
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Circle-Rectangle collision detection (intersection)
...One of the edges of the rectangle has a point in the circle.
Note that this does not require the rectangle to be axis-parallel.
(One way to see this: if none of the edges has a point in the circle (if all the edges are completely "outside" the circle), then the only way the circle can still in...