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How to implement has_many :through relationships with Mongoid and mongodb?
...tingNote
include Mongoid::Document
embedded_in :appointment
end
This means that you can retrieve the notes together with an appointment all together, whereas you would need multiple queries if this was an association. You just have to bear in mind the 16MB size limit for a single document whic...
What does it mean to hydrate an object?
When someone talks about hydrating an object, what does that mean?
4 Answers
4
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Does deleting a branch in git remove it from the history?
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Thanks for the answer. Could you clarify what you mean by "each commit has a complete source tree"? As I understand it, each commit in git is a set of deltas that refer back to a parent commit, not an entire tree.
– Ken Liu
Apr 10 '10 ...
What is mod_php?
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mod_php means PHP, as an Apache module.
Basically, when loading mod_php as an Apache module, it allows Apache to interpret PHP files (those are interpreted by mod_php).
EDIT : There are (at least) two ways of running PHP, when wor...
How can I select an element with multiple classes in jQuery?
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@Shimmy: Yes. A space between two selectors means you're searching for descendants; i.e. .a .b searches for elements with class b that are descendants of an element with class a. So something like div a will only return a elements that are inside a div element.
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How do I verify that an Android apk is signed with a release certificate?
...y -verbose -certs my_application.apk
If you see "CN=Android Debug", this means the .apk was signed with the debug key generated by the Android SDK
(means it is unsigned), otherwise you will find something for CN.
For more details see: http://developer.android.com/guide/publishing/app-signing.html
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form_for with nested resources
...you explain why we have to mention "@article" here like this and what this means? what does the below syntax do? : <%= form_for [@article, @comment] do |f| %>
– Arpit Agarwal
Oct 12 '16 at 8:23
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Pandas read_csv low_memory and dtype options
...etermine what dtype a column should have once the whole file is read. This means nothing can really be parsed before the whole file is read unless you risk having to change the dtype of that column when you read the last value.
Consider the example of one file which has a column called user_id.
It c...
Jquery mouseenter() vs mouseover()
..., i.e. there are no children where another event could come from (with the meaning of “entered/left” the parent?!)
children might also have similar handlers registered, which enter/leave correctly, but unrelated to the parental enter/leave cycle
mouseover/mouseout
the target is the actual ele...
Is it smart to replace boost::thread and boost::mutex with c++11 equivalents?
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@Anthony are you sure you don't mean interrupt() for boost::thread? Also it appears that it's an original proposal, which changed since 2007.
– Alex B
Aug 30 '11 at 11:16
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