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'const string' vs. 'static readonly string' in C#

... When you use a const string, the compiler embeds the string's value at compile-time. Therefore, if you use a const value in a different assembly, then update the original assembly and change the value, the other assembly won't see the change until you re-com...
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How to create a new database using SQLAlchemy?

...amed postgres to use the postgres role, so the simplest thing is to just become that user. At any rate, create an engine as usual with a user that has the permissions to create a database: >>> engine = sqlalchemy.create_engine("postgres://postgres@/postgres") You cannot use engine.execu...
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When to use pip requirements file versus install_requires in setup.py?

... what you know does work, and may include optional dependencies that you recommend. For example you might use SQLAlchemy but suggest MySQL, and so put MySQLdb in the requirements file). So, in summary: install_requires is to keep people away from things that you know don't work, while requirements...
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How to handle the modal closing event in Twitter Bootstrap?

... has finished being hidden from the user (will wait for CSS transitions to complete). And provide an example on how to use them: $('#myModal').on('hidden.bs.modal', function () { // do something… }) Legacy Bootstrap 2.3.2 answer Bootstrap's documentation refers two events you can use. ...
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space between divs - display table-cell

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Need to understand the usage of SemaphoreSlim

...ame time. Calling WaitAsync on the semaphore produces a task that will be completed when that thread has been given "access" to that token. await-ing that task lets the program continue execution when it is "allowed" to do so. Having an asynchronous version, rather than calling Wait, is important...
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How to redirect to previous page in Ruby On Rails?

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What is the difference between a Docker image and a container?

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.prop() vs .attr()

...ut it. I can see the difficulty they were in but still disagree with his recommendation to prefer attr(). Original answer If you've only ever used jQuery and not the DOM directly, this could be a confusing change, although it is definitely an improvement conceptually. Not so good for the bazillion...
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Check if object exists in JavaScript

... if its always a string, you really could(should) do !== for the comparison. – Micah Dec 8 '12 at 14:02 ...