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What can you use Python generator functions for?
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Generators give you lazy evaluation. You use them by iterating over them, either explicitly with 'for' or implicitly by passing it to any function or construct that iterates. You can think of generators as returning multiple items, as if they return a list, but instead of re...
How SignalR works internally?
...ame
Long polling
SignalR tries to choose the "best" connection supported by server and client (you can also force it to use a specific transport).
That's the high level. If you want to see how each transport is implemented, you can look at the source code.
There's also client code for each tran...
Closing WebSocket correctly (HTML5, Javascript)
...t):
To close the connection cleanly, a frame consisting of just a 0xFF byte
followed by a 0x00 byte is sent from one peer to ask that the other peer
close the connection.
If you are writing a server, you should make sure to send a close frame when the server closes a client connect...
Array slicing in Ruby: explanation for illogical behaviour (taken from Rubykoans.com)
I was going through the exercises in Ruby Koans and I was struck by the following Ruby quirk that I found really unexplainable:
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How to detect Windows 64-bit platform with .NET?
... first check if running in a 64-bit process (I think in .NET you can do so by checking IntPtr.Size), and if you are running in a 32-bit process, you still have to call the Win API function IsWow64Process. If this returns true, you are running in a 32-bit process on 64-bit Windows.
Microsoft's Raymon...
Is XML case-sensitive?
...ation is a standalone artifact in beta state, and XSD 1.1 is not supported by the JDK, not even by the most recent one 1.8. It isn't even planned for JDK 1.9 as far as I know. You cannot use advanced XML technologies like JAXB based on XSD 1.1 built-in from the JDK this way.
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Why do we use __init__ in Python classes?
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By what you wrote, you are missing a critical piece of understanding: the difference between a class and an object. __init__ doesn't initialize a class, it initializes an instance of a class or an object. Each dog has colour,...
How to rename a single column in a data.frame?
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I like this solution as you can reference the column name by name, as opposed to requiring to know which number column it is. Better for larger number features.
– Cybernetic
Aug 22 '14 at 17:18
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What is the difference between “instantiated” and “initialized”?
...hem a valid value if you do not do so explicitly. int's initialize to zero by default, DateTime's initialize to DateTime.MinValue by default.
Reference type variables initialize to the object you give it. The compiler will not assign an object (i.e. a valid value) if you don't. In this case the val...
Difference between save and saveAndFlush in Spring data jpa
I am trying to learn spring data JPA by testing some CRUD operation via JpaRepository .
2 Answers
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