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Remove all the elements that occur in one list from another

Let's say I have two lists, l1 and l2 . I want to perform l1 - l2 , which returns all elements of l1 not in l2 . 7 ...
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Do HttpClient and HttpClientHandler have to be disposed between requests?

System.Net.Http.HttpClient and System.Net.Http.HttpClientHandler in .NET Framework 4.5 implement IDisposable (via System.Net.Http.HttpMessageInvoker ). ...
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Why is “if not someobj:” better than “if someobj == None:” in Python?

I've seen several examples of code like this: 9 Answers 9 ...
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Extract subset of key-value pairs from Python dictionary object?

I have a big dictionary object that has several key value pairs (about 16), but I am only interested in 3 of them. What is the best way (shortest/efficient/most elegant) to achieve that? ...
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How can I update the current line in a C# Windows Console App?

When building a Windows Console App in C#, is it possible to write to the console without having to extend a current line or go to a new line? For example, if I want to show a percentage representing how close a process is to completion, I'd just like to update the value on the same line as the cur...
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How to generate a range of numbers between two numbers?

I have two numbers as input from the user, like for example 1000 and 1050 . 28 Answers ...
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How do you get AngularJS to bind to the title attribute of an A tag?

The intent is to have a product name appear in the tooltip of a thumbnail. Browsers do not create a tooltip from "ng-title" or "ng-attr-title." ...
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How to avoid annoying error “declared and not used”

I'm learning Go but I feel it is a bit annoying that when compiling, I should not leave any variable or package unused. 8 ...
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Can you pass parameters to an AngularJS controller on creation?

I have a controller responsible for communicating with an API to update properties of a user, name, email, etc. Each user has an 'id' which is passed from the server when the profile page is viewed. ...
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Bootstrap: Position of dropdown menu relative to navbar item

I have the following dropdown 7 Answers 7 ...