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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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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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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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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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Regex Pattern to Match, Excluding when… / Except between
--Edit-- The current answers have some useful ideas but I want something more complete that I can 100% understand and reuse; that's why I set a bounty. Also ideas that work everywhere are better for me than not standard syntax like \K
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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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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...
How to create a directory using nerdtree
I have been using NERDTree for a while. Every time I need to create a new directory I need to go to terminal. Is there a quick and easy way to create a directory using NERDTree.
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Why do this() and super() have to be the first statement in a constructor?
Java requires that if you call this() or super() in a constructor, it must be the first statement. Why?
19 Answers
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