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Why is std::map implemented as a red-black tree?
...ardware, and exact usage, but since library authors have to support a wide range of usage patterns, they have to take an educated guess. AVL is also slightly harder to implement, so you might want a proven benefit to use it.
– Steve Jessop
Mar 13 '11 at 11:57
...
Most efficient way of making an if-elif-elif-else statement when the else is done the most?
...oop.
Consider these examples...
1.py
something = 'something'
for i in xrange(1000000):
if something == 'this':
the_thing = 1
elif something == 'that':
the_thing = 2
elif something == 'there':
the_thing = 3
else:
the_thing = 4
2.py
something = 's...
What does pylint's “Too few public methods” message mean
...gree, and from 2020 on it's the standard way to go. To have a wide-version-range mechanism (2.7, 3.3+ if I remember) you could use the attrs library, which was actually the blueprint for creating the dataclasses module.
– Tomasz Gandor
Apr 3 '19 at 9:55
...
What is a sealed trait?
...SON
with additional subclasses.
While the set of sub-classes is fixed, the range of operations we may want to do on a JSON blob is
unbounded: parse it, serialize it, pretty-print it, minify it, sanitize it, etc.
Thus it makes sense to model a JSON data structure as a closed sealed trait
hierarchy ra...
Why doesn't GCC optimize a*a*a*a*a*a to (a*a*a)*(a*a*a)?
...and changing the order can easily cause temporaries to exceed the possible range of the exponent. (Not exactly the same, because the exponent doesn't suffer loss of precision... but the representation is still quite limited, and reordering can lead to unrepresentable values)
–...
Remove accents/diacritics in a string in JavaScript
...d as e + ̀.
Using a regex character class to match the U+0300 → U+036F range, it is now trivial to globally get rid of the diacritics, which the Unicode standard conveniently groups as the Combining Diacritical Marks Unicode block.
See comment for performance testing.
Alternatively, if you just...
What is a “context bound” in Scala?
... which forms an array from the results of applying
a given function f on a range of numbers from 0 until a given length. Up to Scala 2.7, tabulate could be
written as follows:
def tabulate[T](len: Int, f: Int => T) = {
val xs = new Array[T](len)
for (i <- 0 until len) xs(i) = f(i)
...
Regular cast vs. static_cast vs. dynamic_cast [duplicate]
...called C-style cast. A C-style cast is basically identical to trying out a range of sequences of C++ casts, and taking the first C++ cast that works, without ever considering dynamic_cast. Needless to say, this is much more powerful as it combines all of const_cast, static_cast and reinterpret_cast,...
What is the maximum amount of RAM an app can use?
...ndroid 3.0, apps can request a "large heap", usually in the hundreds of MB range, but that's considered poor form for most apps.
Furthermore, I noticed that some apps of mine crash with an OutOfMemoryException when using around 30-40 Megabytes.
Bear in mind that the Android garbage collector i...
How does C compute sin() and other math functions?
...software algorithm is as fast as possible and also accurate over the whole range of x values, so the library implements several different algorithms, and its first job is to look at x and decide which algorithm to use.
When x is very very close to 0, sin(x) == x is the right answer.
A bit further ...