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Undefined, unspecified and implementation-defined behavior

What is undefined behavior in C and C++? What about unspecified behavior and implementation-defined behavior? What is the difference between them? ...
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Batch files : How to leave the console window open

I have two batch files, one of them executes another, i.e. 9 Answers 9 ...
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Are 2^n and n*2^n in the same time complexity?

Resources I've found on time complexity are unclear about when it is okay to ignore terms in a time complexity equation, specifically with non-polynomial examples. ...
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Making heatmap from pandas DataFrame

I have a dataframe generated from Python's Pandas package. How can I generate heatmap using DataFrame from pandas package. ...
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Learning Regular Expressions [closed]

I don't really understand regular expressions. Can you explain them to me in an easy-to-follow manner? If there are any online tools or books, could you also link to them? ...
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How can I make an “are you sure” prompt in a Windows batchfile?

I have a batch file that automates copying a bunch of files from one place to the other and back for me. Only thing is as much as it helps me I keep accidentally selecting that command off my command buffer and mass overwriting uncommited changes. ...
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Best practice to validate null and empty collection in Java

I want to verify whether a collection is empty and null . Could anyone please let me know the best practice. 9 Answers ...
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How can I parse JSON with C#?

I have the following code: 17 Answers 17 ...
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method of iterating over sqlalchemy model's defined columns?

I've been trying to figure out how to iterate over the list of columns defined in a SQLAlchemy model. I want it for writing some serialization and copy methods to a couple of models. I can't just iterate over the obj.__dict__ since it contains a lot of SA specific items. ...
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How to replace multiple white spaces with one white space

Let's say I have a string such as: 15 Answers 15 ...