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How do I convert a TimeSpan to a formatted string? [duplicate]
I have two DateTime vars, beginTime and endTime. I have gotten the difference of them by doing the following:
14 Answers
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Test if string is a number in Ruby on Rails
...is_number? Method.
Create a helper method:
def is_number? string
true if Float(string) rescue false
end
And then call it like this:
my_string = '12.34'
is_number?( my_string )
# => true
Extend String Class.
If you want to be able to call is_number? directly on the string instead of pa...
Why should I prefer single 'await Task.WhenAll' over multiple awaits?
...t propagates all errors at once. With the multiple awaits, you lose errors if one of the earlier awaits throws.
Another important difference is that WhenAll will wait for all tasks to complete even in the presence of failures (faulted or canceled tasks). Awaiting manually in sequence would cause un...
jQuery access input hidden value
...l()); This finds the hidden variable with id foo . This search is more specific.
– Mohammed Rafeeq
Mar 7 '14 at 12:40
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Entity Framework .Remove() vs. .DeleteObject()
...ntity as Deleted in the context. (It's EntityState is Deleted after that.) If you call SaveChanges afterwards EF sends a SQL DELETE statement to the database. If no referential constraints in the database are violated the entity will be deleted, otherwise an exception is thrown.
EntityCollection.Rem...
Create numpy matrix filled with NaNs
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I prefer the .fill() method, but the difference in speeds reduces to practically nothing as the arrays get larger.
– naught101
Mar 24 '14 at 11:13
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Update relationships when saving changes of EF4 POCO objects
...se context.ObjectStateManager.ChangeObjectState to set your BlogPost to Modified
Iterate through Tag collection
Use context.ObjectStateManager.ChangeRelationshipState to set state for relation between current Tag and BlogPost.
SaveChanges
Edit:
I guess one of my comments gave you false hope that ...
How to set a default value for an existing column
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+1 for specifying a constraint name, so SQL Server doesn't create a random one.
– HardCode
Jul 22 '11 at 15:25
38
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is it possible to select EXISTS directly as a bit?
I was wondering if it's possible to do something like this (which doesn't work):
9 Answers
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How do I check which version of NumPy I'm using?
... is actually very nice as it allows you to check the version of numpy even if you have two different versions running on two different versions of python. py -2 -c "import numpy; print(numpy.version.version)" py -3 -c "import numpy; print(numpy.version.version)"
– JSWilson
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