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How can I create a copy of an object in Python?
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Understanding slice notation
... None)] or a[::-1] is equivalent to a[slice(None, None, -1)].
While the :-based notation is very helpful for simple slicing, the explicit use of slice() objects simplifies the programmatic generation of slicing.
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C# 5 async CTP: why is internal “state” set to 0 in generated code before EndAwait call?
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How to prevent a dialog from closing when a button is clicked
...Note: A description of how the dialog closing works under the hood for the base android classes and why the following approaches are chosen follows after the examples, for those who want more details
AlertDialog.Builder - Change default button handler immediately after show()
AlertDialog.Builder bu...
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....
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...
What is the performance of Objects/Arrays in JavaScript? (specifically for Google V8)
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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...