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Sort points in clockwise order?

Given an array of x,y points, how do I sort the points of this array in clockwise order (around their overall average center point)? My goal is to pass the points to a line-creation function to end up with something looking rather "solid", as convex as possible with no lines intersecting. ...
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How to round up to the nearest 10 (or 100 or X)?

I am writing a function to plot data. I would like to specify a nice round number for the y-axis max that is greater than the max of the dataset. ...
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List comprehension with if statement

... You got the order wrong. The if should be after the for (unless it is in an if-else ternary operator) [y for y in a if y not in b] This would work however: [y if y not in b else other_value for y in a] ...
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How do I use PHP to get the current year?

I want to put a copyright notice in the footer of a web site, but I think it's incredibly tacky for the year to be out-of-date. How would I make the year update automatically with PHP 4 and PHP 5 ? ...
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What are Java command line options to set to allow JVM to be remotely debugged?

I know there's some JAVA_OPTS to set to remotely debug a Java program. 8 Answers 8 ...
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asynchronous vs non-blocking

What is the difference between asynchronous and non-blocking calls? Also between blocking and synchronous calls (with examples please)? ...
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What is the difference between currying and partial application?

... see on the Internet various complaints that other peoples examples of currying are not currying, but are actually just partial application. ...
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Breaking out of nested loops [duplicate]

Is there an easier way to break out of nested loops than throwing an exception? (In Perl, you can give labels to each loop and at least continue an outer loop.) ...
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Shorter syntax for casting from a List to a List?

I know its possible to cast a list of items from one type to another (given that your object has a public static explicit operator method to do the casting) one at a time as follows: ...
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data.table vs dplyr: can one do something well the other can't or does poorly?

I'm relatively familiar with data.table , not so much with dplyr . I've read through some dplyr vignettes and examples that have popped up on SO, and so far my conclusions are that: ...