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Prompt Dialog in Windows Forms
...prompt.ShowDialog() == DialogResult.OK ? textBox.Text : "";
}
}
And calling it:
string promptValue = Prompt.ShowDialog("Test", "123");
Update:
Added default button (enter key) and initial focus based on comments and another question.
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#1071 - Specified key was too long; max key length is 1000 bytes
...tle have been answered before, but please do read on. I've read thoroughly all the other questions/answers on this error before posting.
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Why do you create a View in a database?
...joining several tables, or has complex logic or calculations, you can code all that logic into a view, then select from the view just like you would a table.
2. Views can be used as a security mechanism
A view can select certain columns and/or rows from a table (or tables), and permissions set on ...
How to tell where a header file is included from?
How can I tell where g++ was able to find an include file? Basically if I
4 Answers
4...
Tuples( or arrays ) as Dictionary keys in C#
... answered Jun 5 '09 at 14:06
HallgrimHallgrim
13.8k99 gold badges4040 silver badges5353 bronze badges
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make_unique and perfect forwarding
... A make_unique function template does not itself guarantee exception safe calls. It relies on convention, that the caller uses it. In contrast, strict static type checking (which is the main diff between C++ and C) is built on the idea of enforcing safety, via types. And for that, make_unique can si...
Is cout synchronized/thread-safe?
...f particular interest here is the fact that cout is buffered. Even if the calls to write (or whatever it is that accomplishes that effect in that particular implementation) are guaranteed to be mutually exclusive, the buffer might be shared by the different threads. This will quickly lead to corrupt...
Explain the use of a bit vector for determining if all characters are unique
...ge for bits. Every bit in integer value can be treated as a flag, so eventually int is an array of bits (flag). Each bit in your code states whether the character with bit's index was found in string or not. You could use bit vector for the same reason instead of int. There are two differences betwe...
Vim: Close All Buffers But This One
How can I close all buffers in Vim except the one I am currently editing?
13 Answers
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Rails: How do I create a default value for attributes in Rails activerecord's model? [duplicate]
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add_column :status, :string, :default => "P"
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OR
You can use a callback, before_save
class Task < ActiveRecord::Base
before_save :default_values
def default_values
self.status ||= 'P' # note self.status = 'P' if self.status.nil? might be safer (per @frontendbeauty)
end
end
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