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Unable to Cast from Parent Class to Child Class
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Well, I would hesitate to call this a "downcast".
– Kirk Woll
Dec 24 '12 at 4:43
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'POCO' definition
...objects shouldn't have.
EDIT - as other answers have stated, it is technically "Plain Old CLR Object" but I, like David Arno comments, prefer "Plain Old Class Object" to avoid ties to specific languages or technologies.
TO CLARIFY: In other words, they don’t derive from
some special base class...
oh-my-zsh slow, but only for certain Git repo
...oing this in global settings for vagrant virtualbox vms with --global is really handy (slow in guest, fast on host) as described here: stackoverflow.com/a/40943155/1092815 <3
– GabLeRoux
Apr 6 '17 at 14:53
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Javascript add leading zeroes to date
... Very nice way of doing it. I think the accepted answer is really nice, but this even cleaner in my opinion
– Binke
Jan 19 '16 at 10:52
1
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How to increase the gap between text and underlining in CSS
...w property text-underline-offset (as well as text-decoration-thickness) to allow control over the exact placement of an underline. As of this writing, it's an early-stage draft and has not been implemented by any browser, but it looks like it will eventually make the technique below obsolete.
Origi...
Prevent browser from loading a drag-and-dropped file
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You can add a event listener to the window that calls preventDefault() on all dragover and drop events.
Example:
window.addEventListener("dragover",function(e){
e = e || event;
e.preventDefault();
},false);
window.addEventListener("drop",function(e){
e = e || event;
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How do I erase an element from std::vector by index?
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Thank you to all who have answered. What are we to think of a class design when such a simple operation as deleting an element, requires one to come to StackOverflow?
– Pierre
Jan 28 '18 at 18:35
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Understanding “randomness”
...iable or its multiplication, you should be aware that while Random() is usually uniformly distributed, Random() * Random() is not.
Example
This is a uniform random distribution sample simulated through a pseudo-random variable:
BarChart[BinCounts[RandomReal[{0, 1}, 50000], 0.01]]
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Why can Java Collections not directly store Primitives types?
...JVM being what it is, doesn't support a "non-object" object. Java generics allow you to pretend there is no wrapper, but you still pay the performance price of boxing. This is IMPORTANT for certain classes of programs.
Boxing is a technical compromise, and I feel it is implementation detail leaking...
How to find the kth largest element in an unsorted array of length n in O(n)?
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This is called finding the k-th order statistic. There's a very simple randomized algorithm (called quickselect) taking O(n) average time, O(n^2) worst case time, and a pretty complicated non-randomized algorithm (called introselect) ...