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Can you attach a UIGestureRecognizer to multiple views?
...sture recognizer once, I'm not sure if this is a bug or it just needs some more documentation.
12 Answers
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What is the performance cost of having a virtual method in a C++ class?
...at matters is whether the function has been run before recently (making it more likely to be in cache), and whether your architecture can predict static (not virtual) branches and fetch those instructions into cache ahead of time. My PPC does not, but maybe Intel's most recent hardware does.
My ti...
What are some good resources for learning about Artificial Neural Networks? [closed]
...mple gradient descent, but this can be much slower and less effective than more nuanced methods like
Once you've got the basic ideas down you can start to experiment with different "squashing" functions in your hidden layer, adding various kinds of regularization, and various tweaks to make learni...
Storing money in a decimal column - what precision and scale?
...f thumb for storage of fixed point decimal values is to store at least one more decimal place than you actually require to allow for rounding. One of the reasons for mapping the old Currency type in the front end to DECIMAL(19, 4) type in the back end was that Currency exhibited bankers' rounding by...
Understanding recursion [closed]
...Why, yes, recursion can be replaced with iteration, but often recursion is more elegant.
Let's talk about trees. In computer science, a tree is a structure made up of nodes, where each node has some number of children that are also nodes, or null. A binary tree is a tree made of nodes that have exa...
Create Windows service from executable
...otation marks around the actual exe path, and a space after the binPath=.
More information on the sc command can be found in Microsoft KB251192.
Note that it will not work for just any executable: the executable must be a Windows Service (i.e. implement ServiceMain). When registering a non-servic...
How to compare UIColors?
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Good point Zoul, might be more useful to point to a solution not just the problem though =D
– pfrank
May 2 '14 at 20:29
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How to retrieve all keys (or values) from a std::map and put them into a vector?
...unctionality away from the call site. Which can make maintenance a little more difficult.
I'm not sure if your goal is to get the keys into a vector or print them to cout so I'm doing both. You may try something like this:
std::map<int, int> m;
std::vector<int> key, value;
for(std::map...
How to get the containing form of an input?
...ut fields is supported by IE 4.0+, Firefox 1.0+, Opera 9.0+, which is even more browsers that jQuery guarantees, so you should stick to this.
If this were a different type of element (not an <input>), you could find the closest parent with closest:
var $form = $(element).closest('form');
ale...