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MongoDB: Find a document by non-existence of a field?

Is there a way to specify a condition of "where document doesn't contain field" ? 1 Answer ...
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Trying to fire the onload event on script tag

I'm trying to load a set of scripts in order, but the onload event isn't firing for me. 1 Answer ...
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Get pandas.read_csv to read empty values as empty string instead of nan

I'm using the pandas library to read in some CSV data. In my data, certain columns contain strings. The string "nan" is a possible value, as is an empty string. I managed to get pandas to read "nan" as a string, but I can't figure out how to get it not to read an empty value as NaN. Here's sam...
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POST data in JSON format

I have some data that I need to convert to JSON format and then POST it with a JavaScript function. 4 Answers ...
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CPU Privilege Rings: Why rings 1 and 2 aren't used?

A couple of questions regarding the x86 CPU privilege rings: 3 Answers 3 ...
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Visual Studio Wcf Test Client - entering an Int array

I've found the Visual Studio WCF test client quite useful when it comes to a quick test of my WCF service. This is the test client found in this location relative to your Visual Studio install directory: ...
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How to git log from all branches for the author at once?

I need to get the report of all commits that the author did. So far, I have the script that wraps the following command: 2...
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Maven project.build.directory

In Maven, what does the project.build.directory refer to? I am a bit confused, does it reference the source code directory or the target directory in the Maven project? ...
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Emacs: print key binding for a command or list all key bindings

In Emacs (GNU 23.2, *nix), how can I: 2 Answers 2 ...
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How do I check out a specific version of a submodule using 'git submodule'?

How would I go about adding a Git submodule for a specific tag or commit? 2 Answers 2 ...