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Difference between Document-based and Key/Value-based databases?
I know there are three different, popular types of non-sql databases.
2 Answers
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Case objects vs Enumerations in Scala
...This is useful when wishing to persist enumerations (for example, to a database) or create them from data residing in files. However, I find in general that enumerations are a bit clumsy in Scala and have the feel of an awkward add-on, so I now tend to use case objects. A case object is more flexibl...
Redirecting to a certain route based on condition
I'm writing a small AngularJS app that has a login view and a main view, configured like so:
11 Answers
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How does RewriteBase work in .htaccess
...y own words, after reading the docs and experimenting:
You can use RewriteBase to provide a base for your rewrites. Consider this
# invoke rewrite engine
RewriteEngine On
RewriteBase /~new/
# add trailing slash if missing
rewriteRule ^(([a-z0-9\-]+/)*[a-z0-9\-]+)$ $1/ [NC,R=301,L]
T...
CSS Selector for
Is there any way with CSS to target all inputs based on their type? I have a disabled class I use on various disabled form elements, and I'm setting the background color for text boxes, but I don't want my checkboxes to get that color.
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How exactly does the callstack work?
...e variables. Such an anchor address is actually contained in the so-called base or frame pointer which is stored in the EBP register. The offsets, on the other hand, are clearly known at compile time and are therefore hardcoded into the machine code.
This graphic from Wikipedia shows what the typic...
Difference between EXISTS and IN in SQL?
...d returns everything from table and table2. In some (mostly older) SQL databases the in query will get implemented as a nested join, while the join query can be nested, merged, hashed, etc - whatever's quickest.
– Keith
Aug 5 '15 at 19:43
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Convert decimal to binary in python [duplicate]
...int. Also, dec_to_bin(-1) gives ValueError: invalid literal for int() with base 10: 'b1'
– Eric
Jan 8 '13 at 15:42
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Can I set enum start value in Java?
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Based on your statement, would the best practice using java to create a enum of sequential integers (similar to a C++ enum), for an index into an array or something, be to write: enum Ids { NAME(0), AGE(1), HEIGHT(2), WEIGHT...
Polymorphism vs Overriding vs Overloading
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The clearest way to express polymorphism is via an abstract base class (or interface)
public abstract class Human{
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public abstract void goPee();
}
This class is abstract because the goPee() method is not definable for Humans. It is only definable for the subclasses Male ...