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

...you want. – Nic Nilov Feb 17 '17 at 14:30 @NicNilov are you talking about the answer OR Nathan Wallace's comment? ...
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Assign one struct to another in C

... 140 Yes, assignment is supported for structs. However, there are problems: struct S { char * p...
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How do I use Nant/Ant naming patterns?

... | edited Dec 5 '11 at 15:14 noisy 5,38388 gold badges4545 silver badges8686 bronze badges answered Sep ...
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How to execute a java .class from the command line

... answered Aug 14 '09 at 18:53 OscarRyzOscarRyz 180k106106 gold badges363363 silver badges540540 bronze badges ...
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Creating temporary files in bash

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Is object empty? [duplicate]

... answered Feb 14 '11 at 15:57 Sean VieiraSean Vieira 133k2828 gold badges272272 silver badges265265 bronze badges ...
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Import pandas dataframe column as string not int

... answered Nov 14 '12 at 17:58 Wes McKinneyWes McKinney 75.9k2525 gold badges129129 silver badges104104 bronze badges ...
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Convert array of integers to comma-separated string

...; i.ToString())) – TPAKTOPA Dec 12 '14 at 14:06 ...
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How to get a vertical geom_vline to an x-axis of class date?

... 142 Try as.numeric(mydata$datefield[120]): gg + geom_vline(xintercept=as.numeric(mydata$datefield...
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Creating and throwing new exception

... | edited Jul 7 '14 at 23:58 answered Jul 4 '14 at 23:05 ...