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Why does Razor _layout.cshtml have a leading underscore in file name?
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That's how Ruby on Rails does it (Partials start with a _ but the Render Partial call does not include the _), and ASP.net MVC has drawn heavy inspiration from it.
No technical reason really, just a convention to clearly show the intent ...
Update data in ListFragment as part of ViewPager
...ents. The ViewPager is on a vertical phone screen, the lists are not side-by-side.
10 Answers
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Lists: Count vs Count() [duplicate]
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Count() is an extension method introduced by LINQ while the Count property is part of the List itself (derived from ICollection). Internally though, LINQ checks if your IEnumerable implements ICollection and if it does it uses the Count property. So at the end of the...
Prefer composition over inheritance?
...ve from Airplane.
Does TypeB want only some/part of the behavior exposed by TypeA? Indicates need for Composition.
e.g. A Bird may need only the fly behavior of an Airplane. In this case, it makes sense to extract it out as an interface / class / both and make it a member of both classes.
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Why are Python's 'private' methods not actually private?
...es us the ability to create 'private' methods and variables within a class by prepending double underscores to the name, like this: __myPrivateMethod() . How, then, can one explain this
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How to print an exception in Python?
...on. Thus I strongly prefer printing the traceback as in the solution below by @Cat Plus Plus! E.g. I had an issue with an invalid unicode character during XML parsing and printing the exception showed only "invalid character" or so. Not very helpful. The full trace showed "UnicodeEncodeError: chara...
Using IQueryable with Linq
...es (which is what Enumerable uses).
The expression trees can be inspected by your chosen LINQ provider and turned into an actual query - although that is a black art in itself.
This is really down to the ElementType, Expression and Provider - but in reality you rarely need to care about this as a ...
What is a segmentation fault?
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Segmentation fault is a specific kind of error caused by accessing memory that “does not belong to you.” It’s a helper mechanism that keeps you from corrupting the memory and introducing hard-to-debug memory bugs. Whenever you get a segfault you know you are doing somethin...
tomcat - CATALINA_BASE and CATALINA_HOME variables
...tallation.
Optionally, Tomcat may be configured for multiple instances by defining $CATALINA_BASE for each instance. If multiple instances are not configured, $CATALINA_BASE is the same as $CATALINA_HOME.
See: Apache Tomcat 7 - Introduction
Running with separate CATALINA_HOME and CATALINA_BAS...
What is string_view?
... array or string.
Such a view-handle class could be passed around cheaply by value and would offer cheap substringing operations (which can be implemented as simple pointer increments and size adjustments).
Many uses of strings don't require actual owning of the strings, and the string in question...