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rails 3 validation on uniqueness on multiple attributes
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I would say that logically it makes more sense to say that you require recorded_at to be unique within the scope of a zipcode. validate :recorded_at, : uniqueness => { :scope => :zipcode }
– Ariejan
Jul 29 '10 at ...
How do I pass an object from one activity to another on Android? [duplicate]
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What does the exclamation mark do before the function?
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So what the author is doing is saving a byte per function expression; a more readable way of writing it would be this:
(function(){})();
Lastly, ! makes the expression return true. This is because by default all IIFE return undefined, which leaves us with !undefined which is true. Not particul...
entity object cannot be referenced by multiple instances of IEntityChangeTracker. while adding relat
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Why use make over a shell script?
...nd on that. While you could do this with a shell script, it would be a lot more work (explicitly checking the last-modified dates on all the files, etc.) The only obvious alternative with a shell script is to rebuild everything every time. For tiny projects this is a perfectly reasonable approach, b...
AngularJS : How to watch service variables?
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What are pros of this solution? It needs more code in a service, and somewhat the same amount of code in a controller (since we also need to unregister on $destroy). I could say for execution speed, but in most cases it just won't matter.
– Ale...
How do I declare a namespace in JavaScript?
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Why use sprintf function in PHP?
I am trying to learn more about the PHP function sprintf() but php.net did not help me much as I am still confused, why would you want to use it?
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Regular expression to stop at first match
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@Kip: You're probably right, but the .*? notation is more general than [^"]*
– Bondax
Sep 2 '15 at 7:45
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