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Why java.util.Optional is not Serializable, how to serialize the object with such fields
...bda (JSR-335) expert group considered and rejected it. That note, and this one and this one indicate that the primary design goal for Optional is to be used as the return value of functions when a return value might be absent. The intent is that the caller immediately check the Optional and extract ...
How to check if a Ruby object is a Boolean
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'Why would you ever what that?' (and derivatives) is just one of the most annoying questions an engineer can make another :)
– vemv
Mar 27 '14 at 14:20
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CursorLoader usage without ContentProvider
...rsor = null;
}
}
It only needs the AsyncTaskLoader class. Either the one in Android 3.0 or higher, or the one that comes with the compatibility package.
I also wrote a ListLoader which is compatible with the LoadManager and is used to retrieve a generic java.util.List collection.
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Fluid or fixed grid system, in responsive design, based on Twitter Bootstrap
...u need to think in terms of your ENTIRE page. Generally, you want to pick one or the other, but not both. The examples you listed in your question are, in-fact, in the same fixed-width page. In other words, the Scaffolding page is using a fixed-width layout. The fixed grid and fluid grid on the S...
return statement vs exit() in main()
...ll be called. Destructors for other local objects are still not called. ideone.com/Y6Dh3f
– HolyBlackCat
Dec 4 '14 at 18:23
3
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Rails 3.1: Engine vs. Mountable App
Can someone help me understand the differences between a Rails Engine and a Mountable app? In Rails 3.1, you can create either one with the "rails new plugin ___ " command.
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Ruby on Rails: Where to define global constants?
...ly the best place, if your colours are really global and used in more than one model context.
# put this into config/initializers/my_constants.rb
COLOURS = ['white', 'blue'].freeze
Note: when we define constants above, often we want to freeze the array. That prevents other code from later (inadve...
How do I get user IP address in django?
...cause this function to return any address they want (instead of their real one). See esd.io/blog/flask-apps-heroku-real-ip-spoofing.html
– Eli
Jun 6 '14 at 19:06
8
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Delete specific line number(s) from a text file using sed?
I want to delete one or more specific line numbers from a file. How would I do this using sed?
6 Answers
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How does one escape backslashes and forward slashes in VIM find/search?
...lass=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49....