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When should I choose Vector in Scala?
...t your algorithm is doing.
List is a singly linked list, while Vector is a base-32 integer trie, i.e. it is a kind of search tree with nodes of degree 32.
Using this structure, Vector can provide most common operations reasonably fast, i.e. in O(log_32(n)). That works for prepend, append, update, ra...
How to remove stop words using nltk or python
...
from nltk.corpus import stopwords
# ...
filtered_words = [word for word in word_list if word not in stopwords.words('english')]
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Pip freeze vs. pip list
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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How can I reliably get an object's address when operator& is overloaded?
..., minus the compiler work around bits:
template<class T>
struct addr_impl_ref
{
T & v_;
inline addr_impl_ref( T & v ): v_( v ) {}
inline operator T& () const { return v_; }
private:
addr_impl_ref & operator=(const addr_impl_ref &);
};
template<class T>
str...
How to prevent robots from automatically filling up a form?
...ow to track this time without cookies requires some way of server-side database. This may be an impact in performance.
Also you need to tweak the threshold-time.
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What is pseudopolynomial time? How does it differ from polynomial time?
...r of bits required to represent W
i.e. size of input= s =log(W) (log= log base 2)
-> 2^(s)=2^(log(W))
-> 2^(s)=W (because 2^(log(x)) = x)
Now, running time of knapsack= O(nW) = O(n * 2^s)
which is not polynomial.
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YYYY-MM-DD format date in shell script
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$(date +%F_%H-%M-%S)
can be used to remove colons (:) in between
output
2018-06-20_09-55-58
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How do I check if a string contains a specific word?
...ucts like !strpos($a, 'are').
Edit:
Now with PHP 8 you can do this:
if (str_contains('How are you', 'are')) {
echo 'true';
}
RFC
str_contains
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Importing a Swift protocol in Objective-C class
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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String difference in Bash
...e is some difference between the two strings?
– alpha_989
Aug 10 '17 at 15:28
@alpha_989 , here's your answer: $ diff ...