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How do JavaScript closures work?

How would you explain JavaScript closures to someone with a knowledge of the concepts they consist of (for example functions, variables and the like), but does not understand closures themselves? ...
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System.Data.SQLite Close() not releasing database file

I'm having a problem closing my database before an attempt to delete the file. The code is just 17 Answers ...
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pandas DataFrame: replace nan values with average of columns

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Quit and restart a clean R session from within R?

Is there a way I can make an alias, within R, that will execute q() and then restart a clean R session? 12 Answers ...
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How to find keys of a hash?

I know in javascript Objects double as hashes but i have been unable to find a built in function to get the keys 9 Answers...
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Why do Python's math.ceil() and math.floor() operations return floats instead of integers?

Can someone explain this (straight from the docs - emphasis mine): 8 Answers 8 ...
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What is a “surrogate pair” in Java?

I was reading the documentation for StringBuffer , in particular the reverse() method. That documentation mentions something about surrogate pairs . What is a surrogate pair in this context? And what are low and high surrogates? ...
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How to make a new List in Java

We create a Set as: 24 Answers 24 ...
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How to drop all user tables?

How can I drop all user tables in oracle? 9 Answers 9 ...
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Git hook to send email notification on repo changes

How do I configure the appropriate Git hook to send a summary email whenever a set of changes is pushed to the upstream repository? ...