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When should I use the Visitor Design Pattern? [closed]
I keep seeing references to the visitor pattern in blogs but I've got to admit, I just don't get it. I read the wikipedia article for the pattern and I understand its mechanics but I'm still confused as to when I'd use it.
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How do I start PowerShell from Windows Explorer?
Is there a way to start PowerShell in a specific folder from Windows Explorer, e.g. to right-click in a folder and have an option like "Open PowerShell in this Folder"?
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Maximum number of characters using keystrokes A, Ctrl+A, Ctrl+C and Ctrl+V
This is an interview question from google. I am not able to solve it by myself. Can somebody shed some light?
14 Answers
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Why dict.get(key) instead of dict[key]?
Today, I came across the dict method get which, given a key in the dictionary, returns the associated value.
10 Answers...
What's the purpose of META-INF?
In Java, you often see a META-INF folder containing some meta files. What is the purpose of this folder and what can I put there?
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How can I output the value of an enum class in C++11
How can I output the value of an enum class in C++11? In C++03 it's like this:
7 Answers
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What is “callback hell” and how and why does RX solve it?
Can someone give a clear definition together with a simple example that explains what is a "callback hell" for someone who does not know JavaScript and node.js ?
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Find size of object instance in bytes in c#
For any arbitrary instance (collections of different objects, compositions, single objects, etc)
15 Answers
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Generate random numbers with a given (numerical) distribution
I have a file with some probabilities for different values e.g.:
13 Answers
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Disable scrolling on ``
Is it possible to disable the scroll wheel changing the number in an input number field?
I've messed with webkit-specific CSS to remove the spinner but I'd like to get rid of this behavior altogether. I like using type=number since it brings up a nice keyboard on iOS.
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