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How to validate a url in Python? (Malformed or not)

I have url from the user and I have to reply with the fetched HTML. 10 Answers 10 ...
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Simultaneously merge multiple data.frames in a list

I have a list of many data.frames that I want to merge. The issue here is that each data.frame differs in terms of the number of rows and columns, but they all share the key variables (which I've called "var1" and "var2" in the code below). If the data.frames were identical in terms of columns, ...
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How do I use the new computeIfAbsent function?

I very much want to use Map.computeIfAbsent but it has been too long since lambdas in undergrad. 4 Answers ...
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Passing functions with arguments to another function in Python?

Is it possible to pass functions with arguments to another function in Python? 7 Answers ...
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How to make the hardware beep sound in Mac OS X 10.6

I just want that Mac OS X 10.6 does a hardware beep sound like in open suse and other distributions. I tried following approaches ...
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Jackson and generic type reference

I want to use jackson json library for a generic method as follows: 3 Answers 3 ...
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Check whether a string is not null and not empty

How can I check whether a string is not null and not empty? 31 Answers 31 ...
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Run git pull over all subdirectories [duplicate]

How can I update multiple git repositories from their shared parent's directory without cd 'ing into each repo's root directory? I have the following which are all separate git repositories ( not submodules): ...
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How can I bring my application window to the front? [duplicate]

How to bring my application window to front? For example whan my app needs attention. 7 Answers ...
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How to set environment variables in Jenkins?

I would like to be able to do something like: 14 Answers 14 ...