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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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Can PNG image transparency be preserved when using PHP's GDlib imagecopyresampled?
The following PHP code snippet uses GD to resize a browser-uploaded PNG to 128x128. It works great, except that the transparent areas in the original image are being replaced with a solid color- black in my case.
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Regex for string not ending with given suffix
I have not been able to find a proper regex to match any string not ending with some condition. For example, I don't want to match anything ending with an a .
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How do I schedule jobs in Jenkins?
I added a new job in Jenkins, which I want to schedule periodically.
10 Answers
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Index all *except* one item in python
Is there a simple way to index all elements of a list (or array, or whatever) except for a particular index? E.g.,
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Numpy first occurrence of value greater than existing value
I have a 1D array in numpy and I want to find the position of the index where a value exceeds the value in numpy array.
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How do I give text or an image a transparent background using CSS?
Is it possible, using CSS only, to make the background of an element semi-transparent but have the content (text & images) of the element opaque?
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In C++, is it still bad practice to return a vector from a function?
Short version: It's common to return large objects—such as vectors/arrays—in many programming languages. Is this style now acceptable in C++0x if the class has a move constructor, or do C++ programmers consider it weird/ugly/abomination?
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Compare double to zero using epsilon
Today, I was looking through some C++ code (written by somebody else) and found this section:
11 Answers
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How do I check if there are duplicates in a flat list?
For example, given the list ['one', 'two', 'one'] , the algorithm should return True , whereas given ['one', 'two', 'three'] it should return False .
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