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Dynamic type languages versus static type languages
....g. incorporating
number and types of arguments when
resolving names), more opportunities
for compiler optimizations (e.g.
replacing virtual calls by direct
calls when the exact type of the
receiver is known statically),
increased runtime efficiency (e.g. not
all values need to carry...
Most efficient way to prepend a value to an array
...ming I have an array that has a size of N (where N > 0 ), is there a more efficient way of prepending to the array that would not require O(N + 1) steps?
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Hibernate throws MultipleBagFetchException - cannot simultaneously fetch multiple bags
...he @*ToMany annotation.
But note that in most cases a Set<Child> is more appropriate than List<Child>, so unless you really need a List - go for Set
But remind that with using sets you won't eliminate the underlaying Cartesian Product as described by Vlad Mihalcea in his answer!
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Is multiplication and division using shift operators in C actually faster?
...o what is semantically clearest--your coworkers will thank you later. Or, more likely, curse you later if you do otherwise.
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scala vs java, performance and memory? [closed]
...it will be high-performance Scala code. (You may be able to write it in a more idiomatic Scala style and still get good performance, but it depends on the specifics.)
I should add that per amount of time spent programming, my Scala code is usually faster than my Java code since in Scala I can get ...
What is the difference between Python's list methods append and extend?
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What are the differences between B trees and B+ trees?
... trees:
Because B+ trees don't have data associated with interior nodes, more keys can fit on a page of memory. Therefore, it will require fewer cache misses in order to access data that is on a leaf node.
The leaf nodes of B+ trees are linked, so doing a full scan of all objects in a tree require...
Validation failed for one or more entities. See 'EntityValidationErrors' property for more details [
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This has saved my bacon on more than one occasion. I could only upvote once. Wished they'd let me upvote for every time I've copied and pasted this.
– Damon Drake
Dec 31 '13 at 22:42
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Proper way to declare custom exceptions in modern Python?
... with e.errors
Python 3 Update: In Python 3+, you can use this slightly more compact use of super():
class ValidationError(Exception):
def __init__(self, message, errors):
# Call the base class constructor with the parameters it needs
super().__init__(message)
# Now...
String vs. StringBuilder
...fference in my applications between the two, I now think about it a little more carefully.
Luckily, it's relatively straightforward to run performance analysis on your code to see where you're spending the time, and then to modify it to use StringBuilder where needed.
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