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How do I give text or an image a transparent background using CSS?

...r: rgba(255, 0, 0, 0.5); Here's an article from css3.info, Opacity, RGBA and compromise (2007-06-03). <p style="background-color: rgba(255, 0, 0, 0.5);"> <span>Hello, World!</span> </p> ...
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multi-layer perceptron (MLP) architecture: criteria for choosing number of hidden layers and size of

...ayer.But what is the criteria for choosing number of hidden layer in a MLP and how many neural nodes in 1 hidden layer? 4 A...
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What is the real overhead of try/catch in C#?

So, I know that try/catch does add some overhead and therefore isn't a good way of controlling process flow, but where does this overhead come from and what is it's actual impact? ...
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Why can't stash be applied to the working directory?

...d an untracked file that was subsequently added to the repo. When you try and check it out, git rightly refuses because it would be overwriting an existing file. To fix, you could do something like deleting that file (it's okay, it's still in the repo), applying your stash, and then replacing the ...
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How to create a directory and give permission in single command

How to create a directory and give permission in single command in Linux? 8 Answers 8 ...
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Difference between setTimeout with and without quotes and parentheses

I am learning JavaScript and I have learned recently about JavaScript timing events. When I learned about setTimeout at W3Schools , I noticed a strange figure which I didn’t run into before. They are using double quotes and then call the function. ...
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How to pass parameters correctly?

...++ beginner but not a programming beginner. I'm trying to learn C++(c++11) and it's kinda unclear for me the most important thing: passing parameters. ...
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Recommended way of making React component/div draggable

...by mouse) React component, which seems to necessarily involve global state and scattered event handlers. I can do it the dirty way, with a global variable in my JS file, and could probably even wrap it in a nice closure interface, but I want to know if there's a way that meshes with React better. ...
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Why aren't programs written in Assembly more often? [closed]

It seems to be a mainstream opinion that assembly programming takes longer and is more difficult to program in than a higher level language such as C. Therefore it seems to be recommend or assumed that it is better to write in a higher level language for these reasons and for the reason of better po...
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Cannot push to Heroku because key fingerprint

I am new to Rails, and I was trying to deploy a very simple app to Heroku. This is the second app that I deploy, and the first one I was able to do it just fine. However I am having some issues with this one. Whenever I " git push heroku master ", I get this error: ...