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Performance of Arrays vs. Lists

Say you need to have a list/array of integers which you need iterate frequently, and I mean extremely often. The reasons may vary, but say it's in the heart of the inner most loop of a high volume processing. ...
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UIViewController viewDidLoad vs. viewWillAppear: What is the proper division of labor?

...ave always been a bit unclear on the type of tasks that should be assigned to viewDidLoad vs. viewWillAppear : in a UIViewController subclass. ...
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How to use Greek symbols in ggplot2?

My categories need to be named with Greek letters. I am using ggplot2 , and it works beautifully with the data. Unfortunately I cannot figure out how to put those greek symbols on the x axis (at the tick marks) and also make them appear in the legend. Is there any way to do it? ...
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How can I tell AngularJS to “refresh”

I have a click event that happens outside the scope of my custom directive, so instead of using the "ng-click" attribute, I am using a jQuery.click() listener and calling a function inside my scope like so: ...
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How to check if a number is between two values?

In JavaScript, I'm telling the browser to do something if the window size is greater than 500px. I do it like so: 7 Answers...
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What exactly is Heroku?

...was wondering what Heroku really is? I know that its a cloud that helps us to avoid using servers? When do we actually use it? ...
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Rails: redirect_to with :error, but flash[:error] empty

I'm trying to do a redirect while setting the flash[:error] value. (Rails 3.0.10) 3 Answers ...
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Heavy usage of Python at Google [closed]

...s prominence there (possible exceptions include Peter Norvig and Jeremy Hylton, but historically Google's choice of Python predated even them). That's definitely why I first got interested (my publisher let me know about the large amount of copies of my book that Google was purchasing -- at first, ...
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How do you open an SDF file (SQL Server Compact Edition)? [closed]

I have an SDF file and I would like to retrieve its schema and query it with some UI. How can I do this? I have no Visual Studio installed on the machine and I would like to install as little software as possible. ...
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How to insert a line break before an element using CSS

I feel like I saw a way, using the CSS content property, to insert a line break tag before an element. Obviously this doesn't work: ...