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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...
How to use GROUP BY to concatenate strings in SQL Server?
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[Note: This solution only works on SQL 2005 and later. Original question didn't specify the version in use.]
CREATE TABLE #YourTable ([ID] INT, [Name] CHAR(1), [Value] INT)
INSERT INTO #YourTable ([ID],[Name],[Value]) VALUES (1,'A',4)
INSERT INTO #YourTable ([ID],[Name],[Value]) VALUES (1,'B',8)
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What is the difference between partitioning and bucketing a table in Hive ?
...xample, suppose a table using date as the top-level partition and employee_id as the second-level partition leads to too many small partitions. Instead, if we bucket the employee table and use employee_id as the bucketing column, the value of this column will be hashed by a user-defined number into ...
Laravel Migration Change to Make a Column Nullable
I created a migration with unsigned user_id . How can I edit user_id in a new migration to also make it nullable() ?
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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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How do I create a unique ID in Java? [duplicate]
I'm looking for the best way to create a unique ID as a String in Java.
11 Answers
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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...
Patterns for handling batch operations in REST web services?
...ource. For example, to delete several messages at once.
DELETE /mail?&id=0&id=1&id=2
It's a little more complicated to batch update partial resources, or resource attributes. That is, update each markedAsRead attribute. Basically, instead of treating the attribute as part of each reso...
git cherry-pick says “…38c74d is a merge but no -m option was given”
...ommit. You lose all their history, and glom together all their diffs. Your call.
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