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Convert RGB to RGBA over white

I have a hex color, e.g. #F4F8FB (or rgb(244, 248, 251) ) that I want converted into an as-transparent-as-possible rgba color (when displayed over white). Make sense? I'm looking for an algorithm, or at least idea of an algorithm for how to do so. ...
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How to achieve function overloading in C?

Is there any way to achieve function overloading in C? I am looking at simple functions to be overloaded like 14 Answers ...
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How to get the difference between two arrays in JavaScript?

Is there a way to return the difference between two arrays in JavaScript? 69 Answers 6...
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How do you calculate the average of a set of circular data? [closed]

I want to calculate the average of a set of circular data. For example, I might have several samples from the reading of a compass. The problem of course is how to deal with the wraparound. The same algorithm might be useful for a clockface. ...
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Is there a printf converter to print in binary format?

I can print with printf as a hex or octal number. Is there a format tag to print as binary, or arbitrary base? 52 Answer...
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Linq select objects in list where exists IN (A,B,C)

I have a list of orders . I want to select orders based on a set of order statuses. 5 Answers ...
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Element-wise addition of 2 lists?

I have now: 16 Answers 16 ...
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Why can't non-default arguments follow default arguments?

Why does this piece of code throw a SyntaxError? 4 Answers 4 ...
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if else in a list comprehension [duplicate]

I have a list l : 8 Answers 8 ...
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iOS app, programmatically get build version

Is there a way to programmatically get the build version of my app? I need to be able to detect when the user has updated the app through the AppStore, in order to execute some code for adjustments ...