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How do I add a Maven dependency in Eclipse?

I don't know how to use Maven at all. I've been developing for a couple years with Eclipse and haven't yet needed to know about it. However, now I'm looking at some docs that suggest I do the following: ...
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In Firebase, is there a way to get the number of children of a node without loading all the node dat

... The code snippet you gave does indeed load the entire set of data and then counts it client-side, which can be very slow for large amounts of data. Firebase doesn't currently have a way to count children without loading data, but we do plan to add it. Fo...
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How to create ENUM type in SQLite?

...ite, but I can't figure out how to convert an enum field, because I can't find ENUM type in SQLite. 3 Answers ...
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Column order manipulation using col-lg-push and col-lg-pull in Twitter Bootstrap 3

I'm now reading documentation on Twitter Bootstrap 3, and tried to follow column ordering as shown in this page but hit the wall. I don't understand why such a code works nor how to correctly specify the setting. What I want to show is one grid, which is consisted of length 5, and the other leng...
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How to empty/destroy a session in rails?

I can't seem to find it anywhere... How do I delete/destroy/reset/empty/clear a user's session in Rails? Not just one value but the whole thing.. ...
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Setting git parent pointer to a different parent

If I have a commit in the past that points to one parent, but I want to change the parent that it points to, how would I go about doing that? ...
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How can I scale an image in a CSS sprite

In this article, http://css-tricks.com/css-sprites/ , it talks about how can I crop off a smaller image from 1 bigger image. Can you please tell me if it is possible/how I can crop off a smaller image and then scale the cropped off region before I lay it out? ...
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Button background as transparent

...transparent". However, your problem seems to be a bit deeper, as you're using selectors in a really weird way. The way you're using it seems wrong, although if it actually works, you should be putting the background image in the style as an <item/>. Take a closer look at how styles are used ...
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HTML5 Canvas 100% Width Height of Viewport?

I am trying to create a canvas element that takes up 100% of the width and height of the viewport. 7 Answers ...
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Cross-browser multi-line text overflow with ellipsis appended within a fixed width and height

... Just a quick basic idea. I was testing with the following markup: <div id="fos"> <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin nisi ligula, dapibus a volutpat sit amet, mattis et dui. Nunc porttitor accumsan orci id luctus. Ph...