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Ruby on Rails: How do I add a not null constraint to an existing column using a migration?
... Add column with default value
2) THEN: Remove default value
add_column :orders, :items, :integer, null: false, default: 0
change_column :orders, :items, :integer, default: nil
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Spring MVC @PathVariable with dot (.) is getting truncated
...isteredSuffixPatternMatch property of RequestMappingHandlerMapping bean in order to keep suffixPattern recognition activated but limited to registered extension.
Here you define only json and xml extensions :
<bean id="handlerMapping"
class="org.springframework.web.servlet.mvc.method.ann...
What's the Hi/Lo algorithm?
... name. For example, there is an allocator the Customers table, one for the Orders table, and so forth. Forgive me, I'm slow, sometimes.
– Rock Anthony Johnson
Sep 21 '18 at 20:28
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Capistrano error tar: This does not look like a tar archive
...ites it out to the standard output" so Capistrano redirects that to tar in order to uncompress the archive immediately into your new release directory.
(Why Capistrano chose this instead of git checkout defeats me.)
tar fails because it's receiving nothing d:
I can think of two possible solutions/...
How do I create ColorStateList programmatically?
...N: See Roger Alien's answer (and its first comment) to understand that the order of states here is poor: because "enabled" is first, it will override other states that typically occur while a button is enabled. Better to put "enabled" last. (Or instead of "enabled", an empty/default item last.)
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Choosing between MEF and MAF (System.AddIn)
.... While this sounds great, it comes with a heavy price you have to pay in order to cross appdomains. You pay this price in speed and also in the flexibility of the types that you can send back and forth.
MEF is more like dependency injection with some additional benefits such as discoverability a...
How to compare Lists in Unit Testing
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If you don't care about item order: {A,B,C} == {C,B,A}, then use CollectionAssert.AreEquivalent instead msdn.microsoft.com/en-us/library/ms243779.aspx
– user2023861
Aug 11 '16 at 20:25
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When should I choose Vector in Scala?
...ector[A], the only thing I am asserting is that my data has a well defined order and a finite length. Thus, the assertions are weaker with Vector, and this leads to its greater flexibility.
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Advantages and disadvantages of GUID / UUID database keys
...a clash.
Disadvantages:
Larger space use, but space is cheap(er)
Can't order by ID to get the insert order.
Can look ugly in a URL, but really, WTF are you doing putting a REAL DB key in a URL!? (This point disputed in comments below)
Harder to do manual debugging, but not that hard.
Personall...
Proper use of the IDisposable interface
...e created needs to expose some method, that the outside world can call, in order to clean up unmanaged resources. The method can be named whatever you like:
public void Cleanup()
or
public void Shutdown()
But instead there is a standardized name for this method:
public void Dispose()
There ...