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Prevent ViewPager from destroying off-screen views

...e, rather than the default which is 1. In your case, you want to specify 2, so that when you are on the third page, the first one is not destroyed, and vice-versa. mViewPager = (ViewPager)findViewById(R.id.pager); mViewPager.setOffscreenPageLimit(2); ...
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Unittest setUp/tearDown for several tests

... As of 2.7 (per the documentation) you get setUpClass and tearDownClass which execute before and after the tests in a given class are run, respectively. Alternatively, if you have a group of them in one file, you can use setUpModul...
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Python dict how to create key or append an element to key?

... 263 Use dict.setdefault(): dic.setdefault(key,[]).append(value) help(dict.setdefault): set...
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PHP - iterate on string characters

...rray using the str_split function $array = str_split($your_string); Step 2: loop through the newly created array foreach ($array as $char) { echo $char; } You can check the PHP docs for more information: str_split shar...
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How can I add an empty directory to a Git repository?

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Set time part of DateTime in ruby

... 221 Within a Rails environment: Thanks to ActiveSupport you can use: DateTime.now.midnight DateT...
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How do I read / convert an InputStream into a String in Java?

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MongoDb query condition on comparing 2 fields

I have a collection T , with 2 fields: Grade1 and Grade2 , and I want to select those with condition Grade1 > Grade2 , how can I get a query like in MySQL? ...
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Formatting numbers (decimal places, thousands separators, etc) with CSS

... 12 You can use Number.prototype.toLocaleString(). It can also format for other number formats, e.g....