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Why are trailing commas allowed in a list?
I am curious why in Python a trailing comma in a list is valid syntax, and it seems that Python simply ignores it:
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How to sort an IEnumerable
How can I sort an IEnumerable<string> alphabetically. Is this possible?
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Favorite way to create an new IEnumerable sequence from a single value?
I usually create a sequence from a single value using array syntax, like this:
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jQuery Plugin: Adding Callback functionality
I'm trying to give my plugin callback functionality, and I'd like for it to operate in a somewhat traditional way:
6 Answer...
What is the way to quick-switch between tabs in Xcode 4
I have opened many tabs while working on project. (new feature in Xcode 4).
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How to add a footer to a UITableView in Storyboard
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What is the difference between pluck and collect in Rails?
Here are two sample codes.
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COUNT DISTINCT with CONDITIONS
I want to count the number of distinct items in a column subject to a certain condition, for example if the table is like this:
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What exactly does the Access-Control-Allow-Credentials header do?
I'm trying to understand how to use CORS and am confused about what the Access-Control-Allow-Credentials header does.
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