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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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What does a double * (splat) operator do

Have you seen a function declared like this? 3 Answers 3 ...
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Fixing JavaScript Array functions in Internet Explorer (indexOf, forEach, etc.) [closed]

As detailed elsewhere , and otherwise apparently well-known, Internet Explorer (definitely version 7, and in some instances, version 8) do not implement key functions, in particular on Array (such as forEach , indexOf , etc). ...
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Apply CSS styles to an element depending on its child elements

Is it possible to define a CSS style for an element, that is only applied if the matching element contains a specific element (as the direct child item)? ...
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showDialog deprecated. What's the alternative?

Is there something else that should be called? 5 Answers 5 ...
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Pythonic way to combine FOR loop and IF statement

I know how to use both for loops and if statements on separate lines, such as: 10 Answers ...
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How to use the 'sweep' function

When I look at the source of R Packages, i see the function sweep used quite often. Sometimes it's used when a simpler function would have sufficed (e.g., apply ), other times, it's impossible to know exactly what it's is doing without spending a fair amount of time to step through the code block...
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mysql :: insert into table, data from another table?

I was wondering if there is a way to do this purely in sql: 5 Answers 5 ...
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Url.Action parameters?

In listing controller I have, 4 Answers 4 ...
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What is an MvcHtmlString and when should I use it?

The documentation for MvcHtmlString is not terribly enlightening: 4 Answers 4 ...