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What is `params.require(:person).permit(:name, :age)` doing in Rails 4?
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The params in a controller looks like a Hash, but it's actually an instance of ActionController...
Android customized button; changing text color
...="true"
android:state_pressed="true"
android:color="#000000" />
<!-- Unfocused and pressed -->
<item android:state_focused="false"
android:state_pressed="true"
android:color="#000000" />
<!-- Default color -->
<ite...
Django select only rows with duplicate field values
...t work).
– guival
Feb 14 '17 at 17:50
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What is the .order_by() for?
– stef...
In Xcode, how to suppress all warnings in specific source files?
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edited Oct 11 '18 at 1:20
answered Aug 3 '11 at 5:19
Jon ...
Why are nested weights bad for performance? Alternatives?
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C.d.C.d.
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What is the expected syntax for checking exception messages in MiniTest's assert_raises/must_raise?
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answered Jan 20 '13 at 20:27
blowmageblowmage
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LaTeX Optional Arguments
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edited Jan 30 '16 at 3:07
JesseTG
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a...
How to Compare Flags in C#?
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Ian R. O'Brien
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answered Nov 20 '09 at 11:04
Phil DevaneyPhil Devaney
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Run an Application in GDB Until an Exception Occurs
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answered Jul 12 '09 at 13:53
DanDan
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How to change the foreign key referential action? (behavior)
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170
Old question but adding answer so that one can get help
Its two step process:
Suppose, a ...