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Convert a series of parent-child relationships into a hierarchical tree?
...re, that means internally no recursion function calls are done.
The event based ListDecorator allows you to modify the output specifically and to provide multiple type of lists for the same data structure. It's even possible to change the input as the array data has been encapsulated into TreeNode....
What is the most robust way to force a UIView to redraw?
...ease check again; there is no API violation (although it's been cleaned up based on your suggestion I'd argue calling one's own method isn't a violation), nor chance of deadlock or crash. It's also not a “trick”; it uses CALayer's setNeedsDisplay/displayIfNeeded in a normal fashion. Furthermore,...
What characters are allowed in an email address?
... then you have to take IDN into account, which basically makes a character-based approach useless (sorry), unless you first convert the internationalized email addresses to Punycode.
After doing that you can follow (most of) the advice above.
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Is it safe to use Project Lombok? [closed]
...ass annotated with @Data, it will generate the getters and setters for you based on the field names. If you use one of those getters in another class, then decide the field is poorly named, it will not find usages of those getters and setters and replace the old name with the new name.
I would i...
Lock Escalation - What's happening here?
...When SQL is going to change a lot of rows, it's more efficient for the database engine to take fewer, larger locks (e.g. entire table) instead of locking many smaller things (e.g. row locks).
But this can be problematic when you have a huge table, because taking a lock on the entire table may lock...
Why were pandas merges in python faster than data.table merges in R in 2012?
...to accelerate operations like data selection and merges. In this case (database joins) pandas' DataFrame contains no pre-computed information that is being used for the merge, so to speak it's a "cold" merge. If I had stored the factorized versions of the join keys, the join would be significantly f...
Performance optimization strategies of last resort [closed]
...ple, so I give it 10 times as much work to do, but the following times are based on the original workload.
More diagnosis reveals that it is spending time in queue-management. In-lining these reduces the time to 7 seconds.
Now a big time-taker is the diagnostic printing I had been doing. Flush tha...
Is gcc's __attribute__((packed)) / #pragma pack unsafe?
...self is safe, but how the packed members are used can be unsafe. Older ARM-based CPUs didn't support unaligned memory accesses either, newer versions do but I know Symbian OS still disallows unaligned accesses when running on these newer versions (the support is turned off).
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What is the performance of Objects/Arrays in JavaScript? (specifically for Google V8)
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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Difference between Role and GrantedAuthority in Spring Security
...n id;
}
}
The ids of the roles and operations you create in your database would be the GrantedAuthority representation, e.g. ROLE_ADMIN, OP_DELETE_ACCOUNT etc. When a user is authenticated, make sure that all GrantedAuthorities of all its roles and the corresponding operations are returned fro...