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Is there a typical state machine implementation pattern?

We need to implement a simple state machine in C . Is a standard switch statement the best way to go? We have a current state (state) and a trigger for the transition. ...
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What is the “Execute Around” idiom?

What is this "Execute Around" idiom (or similar) I've been hearing about? Why might I use it, and why might I not want to use it? ...
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Finding the index of elements based on a condition using python list comprehension

The following Python code appears to be very long winded when coming from a Matlab background 5 Answers ...
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In Vim, how do I apply a macro to a set of lines?

I have a file with a bunch of lines. I have recorded a macro that performs an operation on a single line. I want to repeat that macro on all of the remaining lines in the file. Is there a quick way to do this? ...
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Is there a benefit to defining a class inside another class in Python?

What I'm talking about here are nested classes. Essentially, I have two classes that I'm modeling. A DownloadManager class and a DownloadThread class. The obvious OOP concept here is composition. However, composition doesn't necessarily mean nesting, right? ...
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How to optimize for-comprehensions and loops in Scala?

So Scala is supposed to be as fast as Java. I'm revisiting some Project Euler problems in Scala that I originally tackled in Java. Specifically Problem 5: "What is the smallest positive number that is evenly divisible by all of the numbers from 1 to 20?" ...
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How to define “type disjunction” (union types)?

One way that has been suggested to deal with double definitions of overloaded methods is to replace overloading with pattern matching: ...
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In Python, what is the difference between “.append()” and “+= []”?

What is the difference between: 12 Answers 12 ...
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Passing an integer by reference in Python

How can I pass an integer by reference in Python? 11 Answers 11 ...
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What is 'Context' on Android?

In Android programming, what exactly is a Context class and what is it used for? 30 Answers ...