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Difference between std::result_of and decltype
I have some trouble understanding the need for std::result_of in C++0x. If I understood correctly, result_of is used to obtain the resulting type of invoking a function object with certain types of parameters. For example:
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Selecting data frame rows based on partial string match in a column
I want to select rows from a data frame based on partial match of a string in a column, e.g. column 'x' contains the string "hsa". Using sqldf - if it had a like syntax - I would do something like:
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What are conventions for filenames in Go?
I could find the conventions for naming packages in Go: no underscore between words, everything lowercase.
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async await return Task
Can somebody explain what does this means into a synchronous method? If I try to change the method to async then VS complain about it.
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What is the proper way to URL encode Unicode characters?
I know of the non-standard %uxxxx scheme but that doesn't seem like a wise choice since the scheme has been rejected by the W3C.
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Nullable vs. int? - Is there any difference?
...llable<int>, which itself is shorthand for Nullable<Int32>.
Compiled code will be exactly the same whichever one you choose to use.
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How to un-commit last un-pushed git commit without losing the changes
Is there a way to revert a commit so that my local copy keeps the changes made in that commit, but they become non-committed changes in my working copy? Rolling back a commit takes you to the previous commit - I want to keep the changes made but I committed them to the wrong branch.
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How do I create a category in Xcode 6 or higher?
I want to create a category on UIColor in my app using Xcode 6. But the thing is that in Xcode 6 there is no Objective-C category file template.
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How do you do a ‘Pause’ with PowerShell 2.0?
OK, I'm losing it. PowerShell is annoying me. I'd like a pause dialog to appear, and it won't.
5 Answers
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Purpose of Django setting ‘SECRET_KEY’
...w google searches and checked out the docs ( https://docs.djangoproject.com/en/dev/ref/settings/#secret-key ), but I was looking for a more in-depth explanation of this, and why it is required.
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