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How to get the original value of an attribute in Rails
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Take a look in rails documentation
http://api.rubyonrails.org/classes/ActiveModel/Dirty.html
Model.attribute_was return previous value :D
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How I can delete in VIM all text from current line to end of file?
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How can I add a boolean value to a NSDictionary?
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What events does an fire when it's value is changed?
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Function return value in PowerShell
...ad more about the return semantics on the about_Return page on TechNet, or by invoking the help return command from PowerShell itself.
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How do I combine two data frames?
...first dataframe df1 with the values of second dataframe df2. you can do it by following steps —
Step 1: Set index of the first dataframe (df1)
df1.set_index('id')
Step 2: Set index of the second dataframe (df2)
df2.set_index('id')
and finally update the dataframe using the following snippet...
scopes with lambda and arguments in Rails 4 style?
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Note that if you are using Ruby 1.9, the short lambda syntax does not allow a space between the arrow and a parameter (scope :find_lazy, ->(param)). In Ruby 2+, the space is allowed. More info here...
– furman87
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How to force a Solution file (SLN) to be opened in Visual Studio 2013?
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Note that you can also force the upgrade of a .sln or .proj file by using the commandline, where devenv is the target IDE version:
devenv "MyProject.sln" /upgrade
Example:
"%programfiles(x86)%\Microsoft Visual Studio 12.0\Common7\IDE\devenv.exe" "D:\Source\MySolution.sln" /upgrade
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Vertical (rotated) label in Android
...), android.graphics.Region.Op.REPLACE);
super.draw(canvas);
}
}
By default, rotated text is from top to bottom. If you set android:gravity="bottom", then it's drawn from bottom to top.
Technically, it fools underlying TextView to think that it's normal rotation (swapping width/height in ...
It has a DefiningQuery but no InsertFunction element… err
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