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What are Runtime.getRuntime().totalMemory() and freeMemory()?

I've been wondering what the exact meaning of Runtime.getRuntime().totalMemory() , Runtime.getRuntime().freeMemory() , and Runtime.getRuntime().maxMemory() is. ...
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Android Log.v(), Log.d(), Log.i(), Log.w(), Log.e() - When to use each one?

The different LogCat methods are: 7 Answers 7 ...
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How do I merge two dictionaries in a single expression in Python (taking union of dictionaries)?

I have two Python dictionaries, and I want to write a single expression that returns these two dictionaries, merged (i.e. taking the union). The update() method would be what I need, if it returned its result instead of modifying a dictionary in-place. ...
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How do you delete all text above a certain line

How do you delete all text above a certain line. For deletion below a line I use "d shift g" 5 Answers ...
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I want to delete all bin and obj folders to force all projects to rebuild everything

I work with multiple projects, and I want to recursively delete all folders with the name 'bin' or 'obj' that way I am sure that all projects will rebuild everything (sometimes it's the only way to force Visual Studio to forget all about previous builds). ...
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How to perform OR condition in django queryset?

I want to write a Django query equivalent to this SQL query: 4 Answers 4 ...
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How to print number with commas as thousands separators?

I am trying to print an integer in Python 2.6.1 with commas as thousands separators. For example, I want to show the number 1234567 as 1,234,567 . How would I go about doing this? I have seen many examples on Google, but I am looking for the simplest practical way. ...
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How do I create a MongoDB dump of my database?

What command do I use and run? 19 Answers 19 ...
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Extract date (yyyy/mm/dd) from a timestamp in PostgreSQL

I want to extract just the date part from a timestamp in PostgreSQL. 7 Answers 7 ...
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Rolling or sliding window iterator?

I need a rolling window (aka sliding window) iterable over a sequence/iterator/generator. Default Python iteration can be considered a special case, where the window length is 1. I'm currently using the following code. Does anyone have a more Pythonic, less verbose, or more efficient method for d...