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How can I display just a portion of an image in HTML/CSS?

Let's say I want a way to display just the the center 50x50px of an image that's 250x250px in HTML. How can I do that. Also, is there a way to do this for css:url() references? ...
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How to center canvas in html5

... canvas center according to the size of the browser window. The canvas is 800x600. And if the window gets below 800x600, it should resize as well(but that's not very important at the moment) ...
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What is the significance of load factor in HashMap?

...ize and load factor . I went through the Java documentation and it says 0.75f is the initial load factor. But I can't find the actual use of it. ...
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How can I check whether a numpy array is empty or not?

...e a look at the .size attribute. It is defined as an integer, and is zero (0) when there are no elements in the array: import numpy as np a = np.array([]) if a.size == 0: # Do something when `a` is empty share ...
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Is \d not supported by grep's basic expressions?

... rogerdpack 46.3k3030 gold badges200200 silver badges315315 bronze badges answered Aug 1 '11 at 16:08 DaenythDaenyth ...
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Depend on a branch or tag using a git URL in a package.json?

... 580 From the npm docs: git://github.com/<user>/<project>.git#<branch> git://gith...
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C#: Looping through lines of multiline string

... answered Sep 30 '09 at 19:41 Jon SkeetJon Skeet 1211k772772 gold badges85588558 silver badges88218821 bronze badges ...
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Creating a JavaScript cookie on a domain and reading it across sub domains

... 209 Just set the domain and path attributes on your cookie, like: <script type="text/javascript...
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Never seen before C++ for loop

... 320 The condition of the for loop is in the middle - between the two semicolons ;. In C++ it is OK ...
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Why were pandas merges in python faster than data.table merges in R in 2012?

... 120 It looks like Wes may have discovered a known issue in data.table when the number of unique stri...