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find vs find_by vs where
...irb(main):037:0> @kit = Kit.find_by(number: "3456")
Kit Load (0.9ms) SELECT "kits".* FROM "kits" WHERE "kits"."number" =
'3456' LIMIT 1
=> #<Kit id: 1, number: "3456", created_at: "2015-05-12 06:10:56",
updated_at: "2015-05-12 06:10:56", job_id: nil>
irb(main):038:0> @kit.upd...
What is the difference between a pseudo-class and a pseudo-element in CSS?
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The CSS 3 selector recommendation is pretty clear about both, but I'll try to show the differences anyway.
Pseudo-classes
Official description
The pseudo-class concept is introduced to permit selection based on information that l...
Warning: The Copy Bundle Resources build phase contains this target's Info.plist file
...Resources build phase or make it a target member.
To resolve this warning, select your Info.plist from the Copy Bundle Resource build phase as shown in Figure 1, then click the Remove (–) button to delete it from the phase.
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How do you round a floating point number in Perl?
...ternally it
uses the Math::Complex module and some functions can break out from the
real axis into the complex plane, for example the inverse sine of 2.
Rounding in financial applications can have serious implications, and
the rounding method used should be specified precisely. In these
cases, it ...
Find all packages installed with easy_install/pip?
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Note that this is slightly different from pip freeze
– s g
Jul 28 '17 at 20:16
1
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How to write a simple Html.DropDownListFor()?
...%= Html.DropDownListFor(n => n.MyColorId,
new SelectList(Colors, "ColorId", "Name")) %>
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iPhone app in landscape mode, 2008 systems
Please note that this question is from 2008 and now is of only historic interest.
8 Answers
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Overloaded method selection based on the parameter's real type
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I expect the method selection to take
in consideration the real (not the
declared) parameter type. Am I missing
something?
Yes. Your expectation is wrong. In Java, dynamic method dispatch happens only for the object the method is called ...
Eclipse - java.lang.ClassNotFoundException
...something didn't know eclipse-junit could do: highlighting test method and selecting RunAs-Junit only runs that particular test-method, not the entire test! No more @Ignore all over the place and gui shortcuts!
– bgs
Oct 25 '12 at 14:46
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MongoDB or CouchDB - fit for production? [closed]
...mongo in production for over a year now. They are using it for everything from users and blog posts, to every image on the site.
shopwiki is using it for a few things including real time analytics and a caching layer. They are doing over 1000 writes per second to a fairly large database.
If you g...