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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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How to read file from relative path in Java project? java.io.File cannot find the path specified

I have a project with 2 packages: 13 Answers 13 ...
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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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How to create a button programmatically?

How do I programmatically create graphical elements (like a UIButton ) in Swift? I tried to create and add button into a view, but wasn't able to. ...
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Which types can be used for Java annotation members?

... It's specified by section 9.6.1 of the JLS. The annotation member types must be one of: primitive String an Enum another Annotation Class an array of any of the above It does seem restrictive, but no doubt there are reasons for it. Also n...
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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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Pandas DataFrame column to list [duplicate]

I am pulling a subset of data from a column based on conditions in another column being met. 4 Answers ...
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How to suppress GCC warnings from library headers?

I have a project that uses log4cxx, boost, etc. libraries whose headers generate lots of (repetitive) warnings. Is there a way to suppress warnings from library includes (i.e. #include ) or includes from certain paths? I'd like to use -Wall and/or -Wextra as usual on project code without relevant in...
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Why is super.super.method(); not allowed in Java?

I read this question and thought that would easily be solved (not that it isn't solvable without) if one could write: 22...
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Abstract class in Java

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