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How do you close/hide the Android soft keyboard using Java?

...gly truth: to hide the Android keyboard, you will be required to provide 2 forms of identification: a Context and either a View or a Window. I have created a static utility method that can do the job VERY solidly, provided you call it from an Activity. public static void hideKeyboard(Activity activi...
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Algorithm to detect corners of paper sheet in photo

...er, but was definitely providing best results. For the Houghline2() Transform, try with the CV_HOUGH_STANDARD as opposed to the CV_HOUGH_PROBABILISTIC, it'll give rho and theta values, defining the line in polar coordinates, and then you can group the lines within a certain tolerance to those. M...
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How to convert timestamps to dates in Bash?

... Mundi 76.1k1717 gold badges104104 silver badges130130 bronze badges answered Oct 26 '12 at 13:49 rafaelzlisboarafaelzlisboa 1,9...
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Grepping a huge file (80GB) any way to speed it up?

...-F, as man fgrep will tell you. Some versions of the man also say that the former is deprecated for the latter, but the shorter form is too convenient to die. – Walter Tross Jun 7 '16 at 16:20 ...
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What are bitwise operators?

... x<<n , so n must be in the form of 2^value? – Ahmed C Jun 5 at 9:26 add a comment  |  ...
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How do I bind a WPF DataGrid to a variable number of columns?

... answered Dec 7 '10 at 18:01 Fredrik HedbladFredrik Hedblad 77.6k2121 gold badges243243 silver badges260260 bronze badges ...
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Flattening a shallow list in Python [duplicate]

...ls.chain and company. >>> list_of_menuitems = [['image00', 'image01'], ['image10'], []] >>> import itertools >>> chain = itertools.chain(*list_of_menuitems) >>> print(list(chain)) ['image00', 'image01', 'image10'] It will work on anything that's iterable, which...
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How do I break out of a loop in Perl?

...variable... but why do all that work just to use a break, it is (very) bad form, not to mention (blah!)just saying, its "possible" just not a good idea & not what you may think it is – osirisgothra Sep 1 '14 at 15:50 ...
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What is causing ERROR: there is no unique constraint matching given keys for referenced table?

...at a foreign key must reference columns that either are a primary key or form a unique constraint. Emphasis mine. share | improve this answer | follow | ...
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HTML5 record audio to file

...ue); /* RIFF type */ writeString(view, 8, 'WAVE'); /* format chunk identifier */ writeString(view, 12, 'fmt '); /* format chunk length */ view.setUint32(16, 16, true); /* sample format (raw) */ view.setUint16(20, 1, true); /* channel cou...