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ElasticSearch, Sphinx, Lucene, Solr, Xapian. Which fits for which usage? [closed]

... why I went ahead and created it in the first place :). Using pure Lucene is challenging. There are many things that you need to take care for if you want it to really perform well, and also, its a library, so no distributed support, it's just an embedded Java library that you need to maintain. In...
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How can you find the height of text on an HTML canvas?

...require to print that text, but I can't find a way to find out how tall it is. I know it's based on the font, but I don't know to convert a font string to a text height. ...
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I need to securely store a username and password in Python, what are my options?

...using a username and password combo. I don't need to create something that is 100% bulletproof (does 100% even exist?), but I would like to involve a good measure of security so at the very least it would take a long time for someone to break it. ...
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Pretty print in MongoDB shell as default

Is there a way to tell Mongo to pretty print output? Currently, everything is output to a single line and it's difficult to read, especially with nested arrays and documents. ...
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How to retrieve absolute path given relative

Is there a command to retrieve the absolute path given the relative path? 21 Answers 2...
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Java Enum Methods - return opposite direction enum

...tion, that has a method that returns the opposite direction (the following is not syntactically correct, i.e, enums cannot be instantiated, but it illustrates my point). Is this possible in Java? ...
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PHP DateTime::modify adding and subtracting months

... Why it's not a bug: The current behavior is correct. The following happens internally: +1 month increases the month number (originally 1) by one. This makes the date 2010-02-31. The second month (February) only has 28 days in 2010, so PHP auto-corrects this by jus...
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Complete Working Sample of the Gmail Three-Fragment Animation Scenario?

...ation" scenario. Specifically, we want to start with two fragments, like this: 6 Answers ...
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Is there a version control system for database structure changes?

...rules to downgrade the version (such as removing a column). Each migration is numbered, and a table keeps track of your current db version. To migrate up, you run a command called "db:migrate" which looks at your version and applies the needed scripts. You can migrate down in a similar way. The mi...
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Django. Override save for model

... or just description updated, so I can skip rescaling every time the model is saved? 7 Answers ...