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R - Concatenate two dataframes?

Given two dataframes a and b : 5 Answers 5 ...
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How to check if there exists a process with a given pid in Python?

Is there a way to check to see if a pid corresponds to a valid process? I'm getting a pid from a different source other than from os.getpid() and I need to check to see if a process with that pid doesn't exist on the machine. ...
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How to create NS_OPTIONS-style bitmask enumerations in Swift?

In Apple's documentation about interacting with C APIs, they describe the way NS_ENUM -marked C-style enumerations are imported as Swift enumerations. This makes sense, and since enumerations in Swift are readily provided as the enum value type it's easy to see how to create our own. ...
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Use jQuery to get the file input's selected filename without the path

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MySql: Tinyint (2) vs tinyint(1) - what is the difference?

I knew boolean in mysql as tinyint (1) . 4 Answers 4 ...
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Can I multiply strings in Java to repeat sequences? [duplicate]

I have something like the following: 19 Answers 19 ...
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What is RSS and VSZ in Linux memory management

What are RSS and VSZ in Linux memory management? In a multithreaded environment how can both of these can be managed and tracked? ...
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Can I create more than one repository for github pages?

I created a repository for hosting a blog on github.Is there any way that I can create more to host multiple blogs?Am I limited to just one repository for hosting(since username.github.com can only be used once?) ...
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Passing arguments forward to another javascript function

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How to get all possible combinations of a list’s elements?

I have a list with 15 numbers in, and I need to write some code that produces all 32,768 combinations of those numbers. 27...