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Changing the selected option of an HTML Select element

In my HTML, I have a <select> with three <option> elements. I want to use jQuery to check each option's value against a Javascript var . If one matches, I want to set the selected attribute of that option. How would I do that? ...
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How can I unit test Arduino code?

I'd like to be able to unit test my Arduino code. Ideally, I would be able to run any tests without having to upload the code to the Arduino. What tools or libraries can help me with this? ...
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data.frame rows to a list

I have a data.frame which I would like to convert to a list by rows, meaning each row would correspond to its own list elements. In other words, I would like a list that is as long as the data.frame has rows. ...
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Trying to understand CMTime and CMTimeMake

1) CMTimeMake(1,10) means duration of 1 second and timescale of 10, or 10 frames per second. This means 1s duration of video with 10 frames? ...
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How to determine if a type implements an interface with C# reflection

Does reflection in C# offer a way to determine if some given System.Type type models some interface? 15 Answers ...
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How do I convert from stringstream to string in C++?

How do I convert from std::stringstream to std::string in C++? 4 Answers 4 ...
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Is it safe to push_back an element from the same vector?

If the second push_back causes a reallocation, the reference to the first integer in the vector will no longer be valid. So this isn't safe? ...
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Covariance, Invariance and Contravariance explained in plain English?

Today, I read some articles about Covariance, Contravariance (and Invariance) in Java. I read the English and German Wikipedia article, and some other blog posts and articles from IBM. ...
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How to add item to the beginning of List?

I want to add a "Select One" option to a drop down list bound to a List<T> . 5 Answers ...
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PostgreSQL “DESCRIBE TABLE”

How do you perform the equivalent of Oracle's DESCRIBE TABLE in PostgreSQL (using the psql command)? 22 Answers ...