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How to prevent ifelse() from turning Date objects into numeric objects
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I'm not sure that last comment this means. Just because something has an NA value doesn't mean it cannot have a class.
– IRTFM
Feb 26 '19 at 18:19
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Choosing a stand-alone full-text search server: Sphinx or SOLR? [closed]
...ng an Apache project, is obviously Apache2-licensed. Sphinx is GPLv2. This means that if you ever need to embed or extend (not just "use") Sphinx in a commercial application, you'll have to buy a commercial license (rationale)
Solr is easily embeddable in Java applications.
Solr is built on top of L...
seek() function?
... use it) and although it helped me I am still a bit confused on the actual meaning of what it does, any explanations are much appreciated, thank you.
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Row Offset in SQL Server
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As for why not to use it, SELECT * means that if the structure of the table changes, your query still runs, but gives different results. If a column is added, this might be useful (although you've still got to use it by name somewhere); if a column is deleted ...
Docker how to change repository name or rename image?
...nd:
$ docker tag
$ docker rmi
This second step is scary, as ‘rmi’ means “remove image”. However, docker won’t actually remove the image if it has any other tags. That is, if you were to immediately follow this with: docker rmi , then it would actually remove the image (assuming there ...
Ignore fields from Java object dynamically while sending as JSON from Spring MVC
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Do you mean that you don't want to add the annotations to the POJO?
– geoand
Apr 16 '14 at 6:36
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What is the difference between Gemfile and Gemfile.lock in Ruby on Rails
...versions we see that the current stable version has changed to 1.4.9. That means if we try to build, bundler will install version 1.4.9 of nokogiri (suppose we don't have Gemfile.lock).
What does it mean ?
As you see if you don't have any Gemfile.lock and run:
bundle install
then the currently used...
MySQL error: key specification without a key length
...ecause data they contain can be huge, and implicitly DB index will be big, meaning no benefit from index.
MySQL requires that you define first N characters to be indexed, and the trick is to choose a number N that’s long enough to give good selectivity, but short enough to save space. The prefix ...
Do git tags get pushed as well?
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I'm pretty sure that means that the HEAD refs won't get pushed, meaning that you ONLY push the tags.
– Dan Rosenstark
Oct 7 '12 at 21:01
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How to swap two variables in JavaScript
...you don't mind an integer result; the values are auto-cast to int32s. This means it can work with numeric strings, Booleans (0/1), null (0), and empty arrays/objects (0). Though the original type isn't preserved, so affected Booleans wouldn't work with typeof a == 'boolean' or a === false, for examp...