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Show or hide element in React

I am messing around with React.js for the first time and cannot find a way to show or hide something on a page via click event. I am not loading any other library to the page, so I am looking for some native way using the React library. This is what I have so far. I would like to show the results...
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How to convert SecureString to System.String?

All reservations about unsecuring your SecureString by creating a System.String out of it aside , how can it be done? 11 A...
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Linking static libraries to other static libraries

I have a small piece of code that depends on many static libraries (a_1-a_n). I'd like to package up that code in a static library and make it available to other people. ...
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Is there a cross-domain iframe height auto-resizer that works?

I tried a few solutions but wasn't successful. I'm wondering if there is a solution out there preferably with an easy-to-follow tutorial. ...
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RequestDispatcher.forward() vs HttpServletResponse.sendRedirect()

What is the conceptual difference between forward() and sendRedirect() ? 9 Answers ...
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What is a unix command for deleting the first N characters of a line?

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MySQL DISTINCT on a GROUP_CONCAT()

I am doing SELECT GROUP_CONCAT(categories SEPARATOR ' ') FROM table . Sample data below: 6 Answers ...
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Determine if Python is running inside virtualenv

Is it possible to determine if the current script is running inside a virtualenv environment? 16 Answers ...
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Parsing XML with namespace in Python via 'ElementTree'

I have the following XML which I want to parse using Python's ElementTree : 6 Answers ...
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How do I use JDK 7 on Mac OSX?

I would like to use the WatchService API as mentioned in this link: http://download.oracle.com/javase/tutorial/essential/io/notification.html ...