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multiprocessing.Pool: When to use apply, apply_async or map?
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Regarding apply vs map:
pool.apply(f, args): f is only executed in ONE of the workers of the pool. So ONE of the processes in the pool will run f(args).
pool.map(f, iterable): This method chops the iterable into a number of chunks which it...
Generate a heatmap in MatPlotLib using a scatter data set
...iddle of a side, only the ratio is smaller (2/sqrt(3) ≈ 1.15 for hexagon vs. sqrt(2) ≈ 1.41 for square). The only shape where the distance from the center to every point on the border is equal is the circle.
– Jaan
May 25 '14 at 18:46
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Good or bad practice? Initializing objects in getter
... for Developing Class Libraries at http://msdn.microsoft.com/en-US/library/vstudio/ms229042.aspx
Regarding Lazy<T>
The generic Lazy<T> class was created exactly for what the poster wants, see Lazy Initialization at http://msdn.microsoft.com/en-us/library/dd997286(v=vs.100).aspx. If you h...
How should I have explained the difference between an Interface and an Abstract class?
...ic Method
1.3.1. Java Interface Static Method, code example, static method vs default method
1.3.2. Important points about java interface static method:
1.4 Java Functional Interfaces
1.1.1. Abstract classes versus interfaces in Java 8
Java 8 interface changes include static methods and default ...
What is the difference between the Data Mapper, Table Data Gateway (Gateway), Data Access Object (DA
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Data Mapper vs Table Data Gateway
To make a long story short:
the Data Mapper will receive the Domain Model object(Entity) as param and will use it to implement the CRUD operations
the Table Data Gateway will receives all the params(as p...
Why are mutable structs “evil”?
...and then change the copy. To my mind, the big problem with the value-type vs class distinction is the use of the "." operator for two purposes. If I had my druthers, classes could support both "." and "->" for methods and properties, but the normal semantics for "." properties would be to creat...
What are MVP and MVC and what is the difference?
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community wiki
13 revs, 11 users 51%Glenn Block
28
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What is a ViewModelLocator and what are its pros/cons compared to DataTemplates?
...Model>();
}
}
// returns true if editing .xaml file in VS for example
private bool IsInDesignMode()
{
return DesignerProperties.GetIsInDesignMode(dummy);
}
}
And to use it I can add my locator to App.xaml resources:
xmlns:core="clr-namespace:MyViewModelLoca...
Swift and mutating struct
...d better.
This is also why Swift-folks are all raving on about value types vs. reference types. By nature, reference types rack up "contacts" all over the place, and value types usually don't need more than a couple. Value types are "Swift"-er.
So back to small picture: structs. Structs are a big de...
What does the brk() system call do?
... case where you should to use brk instead of malloc or mmap nowadays.
brk vs malloc
brk is one old possibility of implementing malloc.
mmap is the newer stricly more powerful mechanism which likely all POSIX systems currently use to implement malloc. Here is a minimal runnable mmap memory allocat...