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

... | edited Jun 16 '19 at 18:52 answered Feb 15 '12 at 0:25 ...
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Difference between PCDATA and CDATA in DTD

... | edited Nov 28 '19 at 16:40 Toby Speight 22.1k1313 gold badges5454 silver badges7979 bronze badges ...
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How to delete from a text file, all lines that contain a specific string?

... | edited Jun 27 '19 at 9:57 Felix Rabe 3,75644 gold badges2121 silver badges3333 bronze badges ...
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Organizing a multiple-file Go project [closed]

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Splitting on last delimiter in Python string?

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What is the different between 'Auto' and '*' when setting width/height for a grid column?

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android TextView: setting the background color dynamically doesn't work

... | edited Jan 3 '19 at 11:54 Nilesh Rathod 52.4k1313 gold badges8282 silver badges105105 bronze badges ...
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In tmux can I resize a pane to an absolute value

...rokes though. – clwen Oct 20 '14 at 19:03 2 I didn't like that either, so added "bind-key J resiz...
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jQuery Scroll to bottom of page/iframe

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Round a Floating Point Number Down to the Nearest Integer?

...approach. – Gyan Veda Jun 16 '14 at 19:40 23 This works well for positive numbers, but negative n...