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Is there any way to use a numeric type as an object key?

It seems that when I use a numeric type as a key name in an object, it always gets converted to a string. Is there anyway to actually get it to store as a numeric? The normal typecasting does not seem to work. ...
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How can I sharpen an image in OpenCV?

How can I sharpen an image using OpenCV ? 9 Answers 9 ...
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Automatically plot different colored lines

I'm trying to plot several kernel density estimations on the same graph, and I want them to all be different colors. I have a kludged solution using a string 'rgbcmyk' and stepping through it for each separate plot, but I start having duplicates after 7 iterations. Is there an easier/more efficien...
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ERROR: Error installing capybara-webkit:

Any suggestions on how to fix? 7 Answers 7 ...
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How to delete multiple values from a vector?

I have a vector like: a = c(1:10) and I need to remove multiple values, like: 2, 3, 5 8 Answers ...
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Get element inside element by class and ID - JavaScript

Alright, I've dabbled in JavaScript before, but the most useful thing I've written is a CSS style-switcher. So I'm somewhat new to this. Let's say I have HTML code like this: ...
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Creating a blurring overlay view

In the Music app of the new iOS, we can see an album cover behind a view that blurs it. 25 Answers ...
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What does the “yield” keyword do?

What is the use of the yield keyword in Python, and what does it do? 42 Answers 42 ...
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How to create a circular ImageView in Android? [duplicate]

How could I create a rounded ImageView in Android? 1 Answer 1 ...
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What is a “callback” in C and how are they implemented?

From the reading that I have done, Core Audio relies heavily on callbacks (and C++, but that's another story). 9 Answers ...