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Rake just one migration
...n dropped from the database outside of Rails, rake db:migrate:up VERSION=my_version may do nothing, because the schema_migrations table still says it is has been run. In the same situation rake db:migrate:redo VERSION=my_version may fail because it cannot drop the table. In this case, comment out th...
How to delete all the rows in a table using Eloquent?
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Note: truncate() also resets any AUTO_INCREMENT counter (also note you can't truncate tables which have foreign key constraints.)
– William Turrell
Jul 24 '16 at 13:06
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Ruby convert Object to Hash
...book"
@price = 15.95
end
end
gift = Gift.new
hash = {}
gift.instance_variables.each {|var| hash[var.to_s.delete("@")] = gift.instance_variable_get(var) }
p hash # => {"name"=>"book", "price"=>15.95}
Alternatively with each_with_object:
gift = Gift.new
hash = gift.instance_variable...
How to convert a char to a String?
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@BinkanSalaryman using javac 1.8.0_51-b16 and then javap to decompile, I see the constructor/method calls I have in the answer. What are you using?
– Paul Bellora
Jul 24 '15 at 2:55
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event Action vs event EventHandler
...ardArgs("Fred"));
//Console.WriteLine($"{HeightSensorTypes.Keyence_IL030}:{(int)HeightSensorTypes.Keyence_IL030}");
Console.ReadLine();
}
private static void SomeSimpleEvent1(int num)
{
Console.WriteLine($"{nameof(SomeSimpleEvent1)}:{num}");
}
private st...
how to debug the js in jsfiddle
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fiddle.jshell.net contains only _display with (index) inside, which is a nearly empty HTML page with <p>That page doesn't exist.</p>. My js code is not there
– CygnusX1
Jun 27 '18 at 22:16
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ViewBag, ViewData and TempData
...mple, I set a ViewBag.Title property on all my Views which gets used in my _Layout.cshtml base view file. Another case where I use it is giving info-messages (e.g. "Product saved successfully!") to the users. I placed some generic markup in Layout.cshtml to render a message if provided and this allo...
postgresql - sql - count of `true` values
...actually omit ELSE null to get the same result.
– 200_success
May 12 '16 at 18:26
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Automate ssh-keygen -t rsa so it does not ask for a passphrase
...ing prompted for a passphrase you can do the following:
$ ssh-keygen -f id_rsa -t rsa -N ''
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How to find the type of an object in Go?
...that you can get rid of variable t, so t := v.(type) becomes v.(type), and _ = t is no longer needed.
– Akavall
Feb 28 '17 at 6:21
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