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.NET data structures: ArrayList, List, HashTable, Dictionary, SortedList, SortedDictionary — Speed,
...ately, some of them are quite similar, and I'm not always sure when to use one and when to use another. Most of my C# and Visual Basic books talk about them to a certain extent, but they never really go into any real detail.
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Scala how can I count the number of occurrences in a list
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A somewhat cleaner version of one of the other answers is:
val s = Seq("apple", "oranges", "apple", "banana", "apple", "oranges", "oranges")
s.groupBy(identity).mapValues(_.size)
giving a Map with a count for each item in the original sequence:
Map(b...
What is __stdcall?
...and it must not be confused with _standard_call in that it is standard-c ! one might think that would be the point of __stdcall if one doesnt know better
– Johannes Schaub - litb
Nov 18 '08 at 2:38
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Core pool size vs maximum pool size in ThreadPoolExecutor
... maxPoolSize, then create a new Thread if Total task queue is full and new one is arriving.
Form doc:
(If there are more than corePoolSize but less than maximumPoolSize threads running, a new thread will be created only if the queue is full.)
Now, Take a simple example,
ThreadPoolExecutor executo...
How to check if a string contains an element from a list in Python
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this one is clever - I didn't know tuples could do that!, but it only works when your substring is anchored to one end of the string.
– Dannid
Nov 8 '16 at 17:38
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Can we instantiate an abstract class?
During one of my interview, I was asked "If we can instantiate an abstract class?"
16 Answers
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Qt 5.1.1: Application failed to start because platform plugin “windows” is missing
...icate. Do not forget that many similar questions existed when I asked this one (see e.g. the list below). However, none of these answers solved my problem . After a long search I found a comment which had been ignored by all users pointing to the missing lib. Now, many months later, the comment h...
Difference of keywords 'typename' and 'class' in templates?
...c cases where there is a difference between typename and class.
The first one is in the case of dependent types. typename is used to declare when you are referencing a nested type that depends on another template parameter, such as the typedef in this example:
template<typename param_t>
clas...
Finding last occurrence of substring in string, replacing that
...ings in the same format, and I want to find the last "." character in each one, and replace it with ". - ". I've tried using rfind, but I can't seem to utilize it properly to do this.
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Create directory if it does not exist
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This one is not the easiest one, but is a easy one for understanding.
– Wang Jijun
Mar 28 '18 at 21:57
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