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How can a time function exist in functional programming?

I've to admit that I don't know much about functional programming. I read about it from here and there, and so came to know that in functional programming, a function returns the same output, for same input, no matter how many times the function is called. It's exactly like a mathematical function w...
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Git pull without checkout?

I'm used to running git pull and other commands from within a branch I'm working on. But I have set up a development server that several people work on, so I don't want to have to switch branches when I do it. If I want to update an existing branch on the dev server from the github repository we a...
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Generate list of all possible permutations of a string

How would I go about generating a list of all possible permutations of a string between x and y characters in length, containing a variable list of characters. ...
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Python Pandas: Get index of rows which column matches certain value

Given a DataFrame with a column "BoolCol", we want to find the indexes of the DataFrame in which the values for "BoolCol" == True ...
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Is it possible to allow didSet to be called during initialization in Swift?

...e it within your init-Method: class SomeClass { var someProperty: AnyObject! { didSet { //do some Stuff } } init(someProperty: AnyObject) { setSomeProperty(someProperty) } func setSomeProperty(newValue:AnyObject) { self.someProperty ...
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When is localStorage cleared?

How long can I expect data to be kept in localStorage. How long will an average user's localStorage data persist? If the user doesn't clear it, will it last till a browser re-install? ...
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How can I add a help method to a shell script?

How do I check if a -h attribute has been passed into a shell script? I would like to display a help message when a user calls myscript.sh -h . ...
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Java Try Catch Finally blocks without Catch

I'm reviewing some new code. The program has a try and a finally block only. Since the catch block is excluded, how does the try block work if it encounters an exception or anything throwable? Does it just go directly to the finally block? ...
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“PKIX path building failed” and “unable to find valid certification path to requested target”

I'm trying to get tweets using twitter4j library for my java project. On my first run I got an error about certificate sun.security.validator.ValidatorException and sun.security.provider.certpath.SunCertPathBuilderException . Then I added twitter certificate by: ...
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How to get name of calling function/method in PHP? [duplicate]

I am aware of function debug_backtrace , but I am looking for some ready to use implementation of function like GetCallingMethodName() ? It would be perfect if it gave method's class too (if it is indeed a method). ...