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Ruby on Rails: How do I add a not null constraint to an existing column using a migration?

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Is there a __CLASS__ macro in C++?

... answered Nov 3 '09 at 11:44 Aleksei PotovAleksei Potov 1,4411111 silver badges1414 bronze badges ...
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What's the standard way to work with dates and times in Scala? Should I use Java types or there are

...ime.time.Imports._ DateTime.now // returns org.joda.time.DateTime = 2009-04-27T13:25:42.659-07:00 DateTime.now.hour(2).minute(45).second(10) // returns org.joda.time.DateTime = 2009-04-27T02:45:10.313-07:00 DateTime.now + 2.months // returns org.joda.time.DateTime = 2009-06-27T13:25:59.195-07:00 ...
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How to ISO 8601 format a Date with Timezone Offset in JavaScript?

... Steven MoseleySteven Moseley 13.1k44 gold badges2929 silver badges4242 bronze badges ...
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Is there a function in python to split a word into a list? [duplicate]

... answered Sep 22 '08 at 7:42 Greg HewgillGreg Hewgill 783k167167 gold badges10841084 silver badges12221222 bronze badges ...
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What's the difference between and

... 104 <?> and <? extends Object> are synonymous, as you'd expect. There are a few cases w...
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C++ templates Turing-complete?

... the depth of the recursion available. std::cout << Factorial<4>::val << "\n"; } That was a little fun but not very practical. To answer the second part of the question: Is this fact useful in practice? Short Answer: Sort of. Long Answer: Yes, but only if you are a templa...
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How to determine CPU and memory consumption from inside a process?

... | edited Mar 21 at 13:46 serg06 8488 bronze badges answered Sep 15 '08 at 15:55 ...
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How to convert an iterator to a stream?

... Neuron 3,54333 gold badges2323 silver badges4040 bronze badges answered Jul 1 '14 at 13:29 assyliasassylias ...
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Is if(items != null) superfluous before foreach(T item in items)?

... | edited Jun 23 '11 at 14:35 answered Jun 23 '11 at 14:16 ...