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Memcached vs. Redis? [closed]
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Persistence
By default redis persists your data to disk using a mechanism called snapshotting. If you have enough RAM available it's able to write all of your data to disk with almost no performance degradation. It's almost free!
In snapshot mode there is a chance that a sudden crash could result i...
MYSQL OR vs IN performance
...elieve people who give their "opinion", science is all about testing and evidence.
I ran a loop of 1000x the equivalent queries (for consistency, I used sql_no_cache):
IN: 2.34969592094s
OR: 5.83781504631s
Update:
(I don't have the source code for the original test, as it was 6 years ago, though...
How to print a query string with parameter values when using Hibernate
... I am using grails 2.4.4 and hibernate 4. Changing log4j configuration did not work for me but p6spy worked!
– Champ
Jan 13 '15 at 7:03
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How do you copy a record in a SQL table but swap out the unique id of the new row?
...ce table and destination table are the same and the primary key is a uniqueidentifier (guid). When I try this:
11 Answers
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How do I look inside a Python object?
...t-in functions:
type()
dir()
id()
getattr()
hasattr()
globals()
locals()
callable()
type() and dir() are particularly useful for inspecting the type of an object and its set of attributes, respectively.
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Difference between await and ContinueWith
...tinuation to complete. In the first version, the method will return to the caller as soon as it hits the first await expression which isn't already completed.
They're very similar in that they both schedule a continuation, but as soon as the control flow gets even slightly complex, await leads to m...
Shuffle two list at once with same order
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@ᔕᖺᘎᕊ, It means unpack the values of c so it is called as zip(1,2,3) instead of zip([1,2,3])
– sshashank124
Apr 3 '15 at 1:21
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ERROR: Error 1005: Can't create table (errno: 121)
...how, cause I am not familair with it, but it would seem logical if you can call up the constraints, you can delete them too, or alter them.
– Dorvalla
Oct 2 '12 at 7:29
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Why main does not return 0 here?
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@cnicutar: Functions don’t typically return small values on the stack—because it would involve a pop, a push, and a jump rather than just a move and a return—so it’s almost certainly a register, eax specifically on x86.
– Jon Pu...
Differences between Agda and Idris
...ample is associativity of vector concatenation. Given length-indexed lists called vectors defined thusly:
data Vect : Nat -> Type -> Type where
Nil : Vect 0 a
(::) : a -> Vect n a -> Vect (S n) a
and concatenation with the following type:
(++) : Vect n a -> Vect m a -> Vec...