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Switch branch names in git

There may be more than one way to ask this question, so here's a desciption of the problem. I was working on master and committed some stuff and then decided I wanted to put that work on hold. I backed up a few commits and then branched from before I started my crap work. Practically this works fine...
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What is the difference between JOIN and UNION?

What is the difference between JOIN and UNION ? Can I have an example? 15 Answers 1...
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GitHub clone from pull request?

I would like to clone a repository from GitHub. The problem is I don't want the main branch; I want the version in this unapproved pull request . ...
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How to access pandas groupby dataframe by key

How do I access the corresponding groupby dataframe in a groupby object by the key? 5 Answers ...
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Compare if BigDecimal is greater than zero

How can I compare if BigDecimal value is greater than zero? 6 Answers 6 ...
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How do you detect where two line segments intersect? [closed]

... There’s a nice approach to this problem that uses vector cross products. Define the 2-dimensional vector cross product v × w to be vx wy − vy wx. Suppose the two line segments run from p to p + r and from q to q + s. Then any point on the first...
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Counting the occurrences / frequency of array elements

In Javascript, I'm trying to take an initial array of number values and count the elements inside it. Ideally, the result would be two new arrays, the first specifying each unique element, and the second containing the number of times each element occurs. However, I'm open to suggestions on the form...
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Semicolon before self-invoking function? [duplicate]

What is the benefit of using semicolon before a self-invoking function in JavaScript? I saw this approach in few popular jQuery plugins and I'm curious to find if this is the next awesome thing in JavaScript that I don't know. ...
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Why can't I have abstract static methods in C#?

I've been working with providers a fair bit lately, and I came across an interesting situation where I wanted to have an abstract class that had an abstract static method. I read a few posts on the topic, and it sort of made sense, but is there a nice clear explanation? ...
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Abstract class in Java

What is an "abstract class" in Java? 14 Answers 14 ...