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Rails: How to list database tables/objects using the Rails console?
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To get a list of all model classes, you can use ActiveRecord::Base.subclasses e.g.
ActiveRecord::Base.subclasses.map { |cl| cl.name }
ActiveRecord::Base.subclasses.find { |cl| cl.name == "Foo" }
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Convert boolean to int in Java
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Yes, as in (foo && (!bar || baz)) ? 1 : 0. Obviously, if it's just an identifier, the parens aren't necessary or desirable.
– Blrfl
Sep 25 '10 at 12:58
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What is the difference between call and apply?
What is the difference between using call and apply to invoke a function?
24 Answers
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jQuery form serialize - empty string
...led. Those inputs will not show up in the serialized string. In my case, all form inputs had values but were disabled, resulting in an empty string being returned.
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What is a callback URL in relation to an API?
...thod you're calling after it's done. So if you call
POST /api.example.com/foo?callbackURL=http://my.server.com/bar
Then when /foo is finished, it sends a request to http://my.server.com/bar. The contents and method of that request are going to vary - check the documentation for the API you're acc...
git clone from another directory
...d if no directory
is explicitly given (repo for /path/to/repo.git and foo for host.xz:foo/.git).
Cloning into an existing directory is only allowed if the directory is empty.
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How to set downloading file name in ASP.NET Web API
...sition = new ContentDispositionHeaderValue("attachment")
{
FileName = "foo.txt"
};
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Is there a difference between /\s/g and /\s+/g?
...eans "one or more spaces".
But, because you're using the /g flag (replace all occurrences) and replacing with the empty string, your two expressions have the same effect.
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What is Node.js' Connect, Express and “middleware”?
...t offers a createServer method that extends Connect's Server prototype. So all of the functionality of Connect is there, plus view rendering and a handy DSL for describing routes. Ruby's Sinatra is a good analogy.
Then there are other frameworks that go even further and extend Express! Zappa, for in...
Parsing a JSON string in Ruby
...rse JSON, simply use require 'json':
require 'json'
json = JSON.parse '{"foo":"bar", "ping":"pong"}'
puts json['foo'] # prints "bar"
See JSON at Ruby-Doc.
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