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Why CancellationToken is separate from CancellationTokenSource?

I'm looking for a rationale of why .NET CancellationToken struct was introduced in addition to CancellationTokenSource class. I understand how the API is to be used, but want to also understand why it is designed that way. ...
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Why is processing a sorted array faster than processing an unsorted array?

Here is a piece of C++ code that shows some very peculiar behavior. For some strange reason, sorting the data miraculously makes the code almost six times faster: ...
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Parse a .py file, read the AST, modify it, then write back the modified source code

I want to programmatically edit python source code. Basically I want to read a .py file, generate the AST , and then write back the modified python source code (i.e. another .py file). ...
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Difference between string object and string literal [duplicate]

What is the difference between 13 Answers 13 ...
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E11000 duplicate key error index in mongodb mongoose

Following is my user schema in user.js model - 25 Answers 25 ...
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Converting an object to a string

How can I convert a JavaScript object into a string? 36 Answers 36 ...
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Does the 'mutable' keyword have any purpose other than allowing the variable to be modified by a con

A while ago I came across some code that marked a member variable of a class with the mutable keyword. As far as I can see it simply allows you to modify a variable in a const method: ...
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Strange out of memory issue while loading an image to a Bitmap object

I have a list view with a couple of image buttons on each row. When you click the list row, it launches a new activity. I have had to build my own tabs because of an issue with the camera layout. The activity that gets launched for the result is a map. If I click on my button to launch the image pre...
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How do you produce a .d.ts “typings” definition file from an existing JavaScript library?

I'm using a lot of libraries both my own and 3rd party. I see the "typings" directory contains some for Jquery and WinRT... but how are they created? ...
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What is the correct way to document a **kwargs parameter?

I'm using sphinx and the autodoc plugin to generate API documentation for my Python modules. Whilst I can see how to nicely document specific parameters, I cannot find an example of how to document a **kwargs parameter. ...