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Python : List of dict, if exists increment a dict value, if not append a new dict
...rl] += 1
If you access the defaultdict using a key, and the key is not already in the defaultdict, the key is automatically added with a default value. The defaultdict takes the callable you passed in, and calls it to get the default value. In this case, we passed in class int; when Python calls...
Casting vs using the 'as' keyword in the CLR
...It's possible for the "if" to pass but then the cast to fail, if another thread changes the value of randomObject between the two.
If randomObject really should be an instance of TargetType, i.e. if it's not, that means there's a bug, then casting is the right solution. That throws an exception imme...
Why is not in HTML 5 Tag list while is?
...ere is no analogous concept of "big print" except for a header, which is already covered by seven other tags.
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Python Logging (function name, file name, line number) using a single file
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The correct answer for this is to use the already provided funcName variable
import logging
logger = logging.getLogger('root')
FORMAT = "[%(filename)s:%(lineno)s - %(funcName)20s() ] %(message)s"
logging.basicConfig(format=FORMAT)
logger.setLevel(logging.DEBUG)
The...
What is the best (and safest) way to merge a Git branch into master?
...explain it appropriately, so have a look at the Git book - Rebasing or git-ready: Intro into rebasing for a little description. It's a quite cool feature
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What's the complete range for Chinese characters in Unicode?
...aracters used in
Japanese copies of classical Chinese texts, to indicate reading order.
[\u3400-\u4DBF]
CJK Unified Ideographs Extension-A is a Unicode block containing rare
Han ideographs.
[\u4E00-\u9FCC]
CJK Unified Ideographs is a Unicode block containing the most common
CJK...
What is the difference between C, C99, ANSI C and GNU C?
...on is called C11. Various new features like _Generic, _Static_assert and thread support were added to the language. The update had a lot of focus on multi-core, multi-processing and expression sequencing. From 2011-2017, this was "the C language".
In 2017, C11 was revised and various defect reports...
class
... I find the expression, "opens an object's singleton class"--which I've read many times before--vague. To my knowledge, nowhere in the Ruby docs is "opening" a class defined, even though we all have an idea of what it means. Does class << self mean anything more than the value of self is se...
Predicate in Java
... @polygenelubricants, Why invent Predicate<Integer> when we already have F<Integer, Boolean> which does the exact same thing?
– Pacerier
Aug 14 '14 at 14:17
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Why are C# interface methods not declared abstract or virtual?
...if not in terms of underlying implementation as (sealed virtual) - good to read the other answers here and learn something myself :-)
They don't override anything - there is no implementation in the interface.
All the interface does is supply a "contract" that the class has to adhere to - a patter...