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How to query SOLR for empty fields?

I have a large solr index, and I have noticed some fields are not updated correctly (the index is dynamic). 7 Answers ...
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Using property() on classmethods

... (using the classmethod() function) for getting and setting what is essentially a static variable. I tried to use the property() function with these, but it results in an error. I was able to reproduce the error with the following in the interpreter: ...
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open read and close a file in 1 line of code

... You don't really have to close it - Python will do it automatically either during garbage collection or at program exit. But as @delnan noted, it's better practice to explicitly close it for various reasons. So, what you can do to keep ...
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Reset other branch to current without a checkout

...ws you describe are not equivalent: when you perform reset --hard you lose all the changes in the working tree (you might want to make it reset --soft). What you need is git update-ref refs/heads/OtherBranch refs/heads/CurrentBranch ...
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Covariance, Invariance and Contravariance explained in plain English?

... say it is used to decide whether a method is overwritten or overloaded. All of the above. At heart, these terms describe how the subtype relation is affected by type transformations. That is, if A and B are types, f is a type transformation, and ≤ the subtype relation (i.e. A ≤ B means that ...
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Callback functions in C++

In C++, when and how do you use a callback function? 10 Answers 10 ...
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unbound method f() must be called with fibo_ instance as first argument (got classobj instance inste

... OK, first of all, you don't have to get a reference to the module into a different name; you already have a reference (from the import) and you can just use it. If you want a different name just use import swineflu as f. Second, you are...
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Setting a system environment variable from a Windows batch file?

... The XP Support Tools (which can be installed from your XP CD) come with a program called setx.exe: C:\Program Files\Support Tools>setx /? SETX: This program is used to set values in the environment of the machine or currently logged on user using one of three...
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What is the JavaScript equivalent of var_dump or print_r in PHP? [duplicate]

... This really is not a proper answer as this is not an inherent feature or function of JavaScript and there are innumerable scenarios where one will absolutely not have access to console.log() – Chris Rasys ...
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How do I remove a project configuration in Visual Studio 2008?

... wish Visual Studio offered a quicker way to remove a configuration across all projects. If you have a dozen projects or so in a solution it's a pain to go through each of them and manually delete the configuration. – Stefano Ricciardi Aug 23 '11 at 9:43 ...