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sql primary key and index

Say I have an ID row (int) in a database set as the primary key. If I query off the ID often do I also need to index it? Or does it being a primary key mean it's already indexed? ...
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Set Django IntegerField by choices=… name

When you have a model field with a choices option you tend to have some magic values associated with human readable names. Is there in Django a convenient way to set these fields by the human readable name instead of the value? ...
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Removing multiple keys from a dictionary safely

I know how to remove an entry, 'key' from my dictionary d , safely. You do: 14 Answers ...
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Error: The 'brew link' step did not complete successfully

I'm trying to install node.js via Homebrew. Unfortunately, I get this error: 21 Answers ...
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Pythonic way to find maximum value and its index in a list?

If I want the maximum value in a list, I can just write max(List) , but what if I also need the index of the maximum value? ...
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How to reverse apply a stash?

I have a small patch saved away in my git stash. I've applied it to my working copy using git stash apply . Now, I'd like to back out those changes by reverse applying the patch (kind of like what git revert would do but against the stash). ...
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How to get Maven project version to the bash command line

Previous I issued a question on how to change Maven project vesion from command line which lead me to a new issue. 28 Ans...
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How do I daemonize an arbitrary script in unix?

I'd like a daemonizer that can turn an arbitrary, generic script or command into a daemon . 12 Answers ...
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How to determine if object is in array [duplicate]

I need to determine if an object already exists in an array in javascript. 11 Answers ...
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inline conditionals in angular.js

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