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Virtual/pure virtual explained
...h no directly-callable implementation. Such a method must be overridden at least once in the inheritance hierarchy -- if a class has any unimplemented virtual methods, objects of that class cannot be constructed and compilation will fail.
@quark points out that pure-virtual methods can have an impl...
What is the optimal Jewish toenail cutting algorithm?
...le:
#seq is only valid when consecutive elements in the list differ by at least two.
def isValid(seq):
for i in range(len(seq)-1):
a = seq[i]
b = seq[i+1]
if abs(a-b) == 1:
return False
return True
from itertools import ifilter, permutations
validseqs =...
What is the explicit promise construction antipattern and how do I avoid it?
...ptimisations in place. Using them will likely make your code faster, or at least allow to be optimised by future revisions of the library.
How do I avoid it?
So whenever you find yourself manually creating a Promise or Deferred and already existing promises are involved, check the library API firs...
Websocket API to replace REST API?
...se connections. (and that happens often on mobile phones). So, you need at least a kind of mechanism to kick out idle users. I haven't put effort yet in doing that thoug
How do you know when to use fold-left and when to use fold-right?
...perators that don't have a specific associativity, always use foldLeft, at least in Scala. Otherwise, go with other advice given in the answers ;).
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App restarts rather than resumes
Hopefully someone can help me figure out, if not a solution, at least an explanation for a behaviour.
9 Answers
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__lt__ instead of __cmp__
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must define at least one ordering operation: < > <= >= .... eq is not needed as total order if ! a<b and b<a then a=b
– Xanlantos
May 22 at 2:50
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The written versions of the logical operators
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At least Visual Studio 2015 CTP 6 did not like my or or not without including the header.
– usr1234567
Mar 15 '15 at 22:25
...
What does pylint's “Too few public methods” message mean
...ou're basically treating the class as a dictionary. Classes should have at least a few methods to operate on the data that they hold.
If your class looks like this:
class MyClass(object):
def __init__(self, foo, bar):
self.foo = foo
self.bar = bar
Consider using a dictionary ...
Why is good UI design so hard for some Developers? [closed]
... There are people out there who focus on UI design.
Learn about design. At least a little bit. Try to learn a few of the design concepts and techniques from the long list below. If you are more ambitious, read some books, attend a conference, take a class, get a degree. There are lot of ways to lear...