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Assigning default value while creating migration file
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Default migration generator does not handle default values (column modifiers are supported but do not include default or null), but you could create your own generator.
You can also manually update the migration file prior to running rake db:migrate by adding th...
Postgresql: Conditionally unique constraint
...le slower, the advantage of the exclude solution is that it is deferrable (and by default defers until the end of the statement). In contrast, the accepted unique index solution cannot be deferred (and is checked after every row change). So a bulk update is often not possible because steps during th...
Match whole string
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Use the start and end delimiters: ^abc$
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How can I make a ComboBox non-editable in .NET?
... How do I avoid the gray appearance?
– Anders Lindén
May 23 '16 at 12:31
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@Anders...
Remove whitespaces inside a string in javascript
...ered May 29 '12 at 13:43
Henrik AnderssonHenrik Andersson
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How can I find the number of days between two Date objects in Ruby?
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From wikipedia:
The Julian date (JD) is the interval of time in days and fractions of a day since January 1, 4713 BC Greenwich noon, Julian proleptic calendar.
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Check if a key exists inside a json object
... answered Dec 27 '13 at 16:38
Anand JhaAnand Jha
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rails simple_form - hidden field - create?
...html => { :value => "some value" }
– Linus Oleander
Mar 20 '11 at 21:14
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This is the simp...
Vertical Text Direction
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@CrystalMiller and BTW, w3schools can be a good helper, but it is not the source/original documentation (so it can miss some things), the "official" is w3.org, or the closest, more human-readable, to it is mozilla's developer network - "MDN...
Shorthand way for assigning a single field in a record, while copying the rest of the fields?
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And lenses-like packages often define operators in addition to functions for getting and setting fields. For example, test $ c .~ "Goodbye" is how lens would do it iirc. I'm not saying this is intutitive, but once you know ...