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What is a “cache-friendly” code?
...her end of the memory spectrum (DRAM), the memory is very cheap (i.e. literally millions of times cheaper) but takes hundreds of cycles after a request to receive the data. To bridge this gap between super fast and expensive and super slow and cheap are the cache memories, named L1, L2, L3 in decre...
What is the difference between a field and a property?
...sed via get and set properties. Properties provide a level of abstraction allowing you to change the fields while not affecting the external way they are accessed by the things that use your class.
public class MyClass
{
// this is a field. It is private to your class and stores the actual da...
Efficiency of Java “Double Brace Initialization”?
...2$8.class
2009/05/27 16:35 2,022 DemoApp2$9.class
These are all classes which were generated when I was making a simple application, and used copious amounts of anonymous inner classes -- each class will be compiled into a separate class file.
The "double brace initialization", as al...
Python logging not outputting anything
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@Ben where does it say that? All I can see is "The default level is WARNING, which means that only events of this level and above will be tracked, unless the logging package is configured to do otherwise."
– Omri Barel
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Strip Leading and Trailing Spaces From Java String
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Use String#trim() method or String allRemoved = myString.replaceAll("^\\s+|\\s+$", "") for trim both the end.
For left trim:
String leftRemoved = myString.replaceAll("^\\s+", "");
For right trim:
String rightRemoved = myString.replaceAll("\\s+$", "");
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How does inline Javascript (in HTML) work?
I know this is bad practice. Don't write code like this if at all possible.
6 Answers
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How do I prevent the padding property from changing width or height in CSS?
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This is pure magic! - It fixes the box model we all know and hate! i.e. makes it work the way intuition suggests it should - rather than the specs - but as far as I know doesn't break any specs either :D This article clarifies it well... stackoverflow.com/questions/779434/...
Overriding a Rails default_scope
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Short answer: Do not use default_scope unless you really have to. You'll probably be better off with named scopes. With that said, you can use with_exclusive_scope to override the default scope if you need to.
Have a look at this question for more details.
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How to change owner of PostgreSql database?
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Note, all tables and sequences inside the database will still be assigned to the original owner.
– Cerin
Nov 2 '16 at 0:52
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Map Tiling Algorithm
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The basic idea of this algorithm is to use a pre-processing step to find all edges and then select the correct smoothing tile according to the shape of the edge.
The first step would be to find all edges. In the example below the edge tiles marked with an X are all green tiles with a tan tile as ...