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Hidden features of Scala

...al regex = "(\\d+)/(\\d+)/(\\d+)".r val regex(year, month, day) = "2010/1/13" The second line looks confusing if you're not used to using pattern matching and extractors. Whenever you define a val or var, what comes after the keyword is not simply an identifier but rather a pattern. That's why t...
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How to switch position of two items in a Python list?

... Tiago Martins Peres 李大仁 5,7791010 gold badges3535 silver badges6161 bronze badges answered Mar 22 '10 at 16:31 samtregarsamtregar ...
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Choice between vector::resize() and vector::reserve()

... | edited Mar 30 '16 at 18:18 Community♦ 111 silver badge answered Sep 13 '11 at 6:49 ...
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How do I change column default value in PostgreSQL?

... Silver LightSilver Light 35.5k2929 gold badges112112 silver badges156156 bronze badges ...
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Scala: join an iterable of strings

... 432 How about mkString ? theStrings.mkString(",") A variant exists in which you can specify a pr...
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Is there a difference between single and double quotes in Java?

... Luiggi Mendoza 79.9k1010 gold badges130130 silver badges278278 bronze badges answered Jan 13 '09 at 15:54 Yuval AdamYuval Adam ...
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How to remove all whitespace from a string?

So " xx yy 11 22 33 " will become "xxyy112233" . How can I achieve this? 9 Answers ...
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Precedence and bitmask operations

... answered Feb 23 '14 at 22:13 MatthewMatthew 44k1111 gold badges8080 silver badges9292 bronze badges ...
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Php multiple delimiters in explode

... SergeSSergeS 9,53311 gold badge2222 silver badges3333 bronze badges ...
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How is the “greater than” or “>” character used in CSS?

... 203 It's a CSS child selector. P > SPAN means applying the style that follows to all SPAN tags th...