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'Operation is not valid due to the current state of the object' error during postback
...pnet:MaxHttpCollectionKeys" value="2001" />
</appSettings>
For more information please read this post. For more insight into the security patch by microsoft you can read this Knowledge base article
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Use email address as primary key?
...gate keys can also be the source of problems; yes, the application will be more robust to change of business and/or integrity rules, however the information can get lost a bit easier and the identity of records becomes less clear. so I would not recommend a rule of a thumb here...
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What does the `forall` keyword in Haskell/GHC do?
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How to return dictionary keys as a list in Python?
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@naught101 Yes, .keys() is way more clear on what goes on.
– Felix D.
May 27 '18 at 21:43
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How to Store Historical Data
...data directly within an operational system will make your application much more complex than it would otherwise be. Generally, I would not recommend doing it unless you have a hard requirement to manipulate historical versions of a record within the system.
If you look closely, most requirements...
Scala: Abstract types vs generics
...orm of object-oriented abstraction. So in a sense you could say Scala is a more orthogonal and complete language.
Why?
What, in particular, abstract types buy you is a nice treatment for these covariance problems we talked about before.
One standard problem, which has been around for a long time, ...
Convert a row of a data frame to vector
... dropping the names. Therefore unname(unlist(df[1,])) is another, slightly more explicit way to get to the same result.
As @Josh comments below, if you have a not-completely-numeric (alphabetic, factor, mixed ...) data frame, you need as.character(df[1,]) instead.
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Fastest way to duplicate an array in JavaScript - slice vs. 'for' loop
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What is the cleanest way to disable CSS transition effects temporarily?
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Your solution is right, but for those looking for more background information: stackoverflow.com/a/31862081/1026
– Nickolay
Aug 8 '15 at 17:36
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