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Creating a daemon in Linux

In Linux I want to add a daemon that cannot be stopped and which monitors filesystem changes. If any changes are detected, it should write the path to the console where it was started plus a newline. ...
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How can I get the behavior of GNU's readlink -f on a Mac?

...ption -f that follows additional links. This doesn't seem to work on Mac and possibly BSD based systems. What would the equivalent be? ...
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How to extract text from a string using sed?

... That's why, isn't it? Replace whatever comes before and after the match with norhing, then print the whole line. – tripleee Jul 19 '12 at 21:01 ...
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Covariance, Invariance and Contravariance explained in plain English?

Today, I read some articles about Covariance, Contravariance (and Invariance) in Java. I read the English and German Wikipedia article, and some other blog posts and articles from IBM. ...
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What is the difference between float and double?

I've read about the difference between double precision and single precision. However, in most cases, float and double seem to be interchangeable, i.e. using one or the other does not seem to affect the results. Is this really the case? When are floats and doubles interchangeable? What are the d...
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How to find all the tables in MySQL with specific column names in them?

I have 2-3 different column names that I want to look up in the entire DB and list out all tables which have those columns. Any easy script? ...
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Find size of object instance in bytes in c#

...is is done (it retrieves the internal "Basic Instance Size" field via TypeHandle of the type). object obj = new List<int>(); // whatever you want to get the size of RuntimeTypeHandle th = obj.GetType().TypeHandle; int size = *(*(int**)&th + 1); Console.WriteLine(size); This works on 3.5...
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How to shorten my conditional statements

... Put your values into an array, and check if your item is in the array: if ([1, 2, 3, 4].includes(test.type)) { // Do something } If a browser you support doesn't have the Array#includes method, you can use this polyfill. Short explanation of the ...
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How can I update the current line in a C# Windows Console App?

...pletion, I'd just like to update the value on the same line as the cursor, and not have to put each percentage on a new line. ...
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Difference between IsNullOrEmpty and IsNullOrWhiteSpace in C# [duplicate]

What are differences between these commands in C# 8 Answers 8 ...