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Understanding __get__ and __set__ and Python descriptors

I am trying to understand what Python's descriptors are and what they are useful for. I understand how they work, but here are my doubts. Consider the following code: ...
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How do ACID and database transactions work?

What is the relationship between ACID and database transaction? 8 Answers 8 ...
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[ :Unexpected operator in shell programming [duplicate]

...et of sh syntax - the /bin/sh executable on your system may provide only standard sh functionality, in which []-style tests are not included. – Tim Aug 5 '10 at 1:17 13 ...
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git stash blunder: git stash pop and ended up with merge conflicts

I did a git stash pop and ended up with merge conflicts. I removed the files from the file system and did a git checkout as shown below, but it thinks the files are still unmerged. I then tried replacing the files and doing a git checkout again and same result. I event tried forcing it with -...
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Pass a data.frame column name to a function

I'm trying to write a function to accept a data.frame ( x ) and a column from it. The function performs some calculations on x and later returns another data.frame. I'm stuck on the best-practices method to pass the column name to the function. ...
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Benefits of header-only libraries

What are the benefits of a header only library and why would you write it that way oppose to putting the implementation into separate file? ...
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When should we use intern method of String on String literals

...in String pool, otherwise a new string object will be added in String pool and the reference of this String is returned. 1...
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Generating random strings with T-SQL

If you wanted to generate a pseudorandom alphanumeric string using T-SQL, how would you do it? How would you exclude characters like dollar signs, dashes, and slashes from it? ...
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How to 'insert if not exists' in MySQL?

I started by googling, and found this article which talks about mutex tables. 10 Answers ...
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How to simulate a touch event in Android?

How to simulate a touch event with Android while giving the X and Y coordinates manually? 7 Answers ...