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Difference between StringBuilder and StringBuffer
What is the main difference between StringBuffer and StringBuilder ?
Is there any performance issues when deciding on any one of these?
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How to enable PHP's openssl extension to install Composer?
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The JPA hashCode() / equals() dilemma
...re have been some discussions here about JPA entities and which hashCode() / equals() implementation should be used for JPA entity classes. Most (if not all) of them depend on Hibernate, but I'd like to discuss them JPA-implementation-neutrally (I am using EclipseLink, by the way).
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Which characters are valid in CSS class names/selectors?
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NB: The W3C says that the use of a leading '-' or '_' should be reserved for vendor-specific CSS extensions (e.g., -moz* classes implemente...
What is the fastest way to compute sin and cos together?
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DebilskiDebilski
61.7k1111 gold badges106106 silver badges132132 bronze badges
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Flatten nested dictionaries, compressing keys
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{1: 12416037344,
2: 12544037731,
11: 5470935132935744593,
22: 4885734186131977315,
111: 3461911260025554326}
Performance:
from functools import reduce
def makeEvilDict(n):
return reduce(lambda acc,x:{x:acc}, [{i:0 for i in range(n)}]+range(n))
import timeit
def time(runnable):
t0 ...
What's the difference between __PRETTY_FUNCTION__, __FUNCTION__, __func__?
...ON__ , __FUNCTION__ , __func__ , and where are they documented? How do I decide which one to use?
5 Answers
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0.1 float is greater than 0.1 double. I expected it to be false [duplicate]
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Remove empty space before cells in UITableView
... the top of my view controller. With this said, it is trying to add the header in the top to account for the navigation bar, but this is not needed since I do not have at the top of my controller.
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