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OO Design in Rails: Where to put stuff
I'm really enjoying Rails (even though I'm generally RESTless), and I enjoy Ruby being very OO. Still, the tendency to make huge ActiveRecord subclasses and huge controllers is quite natural (even if you do use a controller per resource). If you were to create deeper object worlds, where would you p...
Default text which won't be shown in drop-down list
I have a select which initially shows Select language until the user selects a language. When the user opens the select, I don't want it to show a Select language option, because it's not an actual option.
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Cannot create or edit Android Virtual Devices (AVD) from Eclipse, ADT 22.6
... ONLY, THESE BUGS SUBSEQUENTLY FIXED IN FOLLOWING BUILDS
Download and install new ADT v22.6.1 from here (zip) or use SDK manager to update
Seems like some bug from Google side, this problem found after "ADT 22.6" update. Widely reported on "Android Open Source Project - Issue Tracker" and nobody p...
Array versus List: When to use which?
...he underlying stream (and v.v.); quicker than BufferedStream etc;
it internally uses an array-based model of objects (Foo[] rather than List<Foo>), since the size is fixed once built, and needs to be very fast.
But this is definitely an exception; for general line-of-business processing, a L...
What are the differences between Abstract Factory and Factory design patterns?
...le the desired object
instantiation.
The quote assumes that an object is calling its own factory method here. Therefore the only thing that could change the return value would be a subclass.
The abstract factory is an object that has multiple factory methods on it. Looking at the first half of your...
How to activate JMX on my JVM for access with jconsole?
...has the default value as true. (Thank you Sun!) To be super clear, especially to those less familiar with JMX nobs, I use: com.sun.management.jmxremote=true Ref: docs.oracle.com/javase/8/docs/technotes/guides/management/…
– kevinarpe
Nov 15 '15 at 12:28
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Can you do this HTML layout without using tables?
...ob quickly and correctly.
In this case a table worked perfectly.
I personally would have used a table for this.
I think nested tables should be avoided, things can get messy.
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What is difference between Collection.stream().forEach() and Collection.forEach()?
...at with .stream() , I can use chain operations like .filter() or use parallel stream. But what is difference between them if I need to execute small operations (for example, printing the elements of the list)?
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Rails 3 check if attribute changed
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Check out ActiveModel::Dirty (available on all models by default). The documentation is really good, but it lets you do things such as:
@user.street1_changed? # => true/false
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What is the maximum possible length of a .NET string?
...st you could do is 1,073,741,823, but you're not likely to ever be able to allocate that on a 32-bit machine.
This is one of those situations where "If you have to ask, you're probably doing something wrong."
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