...structors in Scala must either call the primary constructor (as in landon9720's) answer, or another auxiliary constructor from the same class, as their first action. They cannot simply call the superclass's constructor explicitly or implicitly as they can in Java. This ensures that the primary const...

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... answered Jun 21 '11 at 2:22 dkaminsdkamins 19.5k66 gold badges4646 silver badges5757 bronze badges ...

...e pioneers introducing closures in Java. His post on closures from January 28, 2007 is named A Definition of Closures On his blog there is lots of information to get you started as well as videos. An here is an excellent Google talk - Advanced Topics In Programming Languages - Closures For Java with...

...mpletely different operations. Trivial example of UNION: mysql> SELECT 23 AS bah -> UNION -> SELECT 45 AS bah; +-----+ | bah | +-----+ | 23 | | 45 | +-----+ 2 rows in set (0.00 sec) similary trivial example of JOIN: mysql> SELECT * FROM -> (SELECT 23 AS bah) AS fo...

... dict.fromkeys([1, 2, 3, 4]) This is actually a classmethod, so it works for dict-subclasses (like collections.defaultdict) as well. The optional second argument specifies the value to use for the keys (defaults to None.) ...

... 263 puts 'abcdefg'.start_with?('abc') #=> true [edit] This is something I didn't know before...

... 126 Followed by @Andy's answer, you can do following to solve your second question: In [56]: df.gr...

... 142 Knuth left this as an exercise (Vol 3, 5.2.5). There do exist in-place merge sorts. They must be...

... | edited Nov 3 '08 at 9:24 answered Nov 2 '08 at 21:40 Gr...