sorting

问题 Given an array A with n elements which starts with all 0 s and another array W also with n elements (all greater than 0 ), we want to perform the following operation repeatedly; For a given k, increment A[0], A[1], .... A[k] each by 1, and report the value of A[0]^2 * W[0] + A[1]^2 * W[1] + ... + A[n-1]^2 * W[n-1] . Looking for an O(log n) solution (per query), or faster. 来源： https://stackoverflow.com/questions/61122170/how-can-we-calculate-weighted-cumulative-sum-of-squares-with-prefix-range

问题 I have a dictionary a = {'ground': obj1, 'floor 1': obj2, 'basement': obj3} I have a list. a_list = ['floor 1', 'ground', 'basement'] I want to sort dictionary a using its keys based on the list. Is it possible to do that? i.e.: sort(a).based_on(a_list) #this is wrong. But I want something like this. The output doesn't have to be another dictionary, I don't mind converting the dictionary to tuples and then sort those. 回答1: The naive way, sorting the list of (key, value) tuples, using the

问题 I have a dictionary a = {'ground': obj1, 'floor 1': obj2, 'basement': obj3} I have a list. a_list = ['floor 1', 'ground', 'basement'] I want to sort dictionary a using its keys based on the list. Is it possible to do that? i.e.: sort(a).based_on(a_list) #this is wrong. But I want something like this. The output doesn't have to be another dictionary, I don't mind converting the dictionary to tuples and then sort those. 回答1: The naive way, sorting the list of (key, value) tuples, using the

问题 I have a dictionary a = {'ground': obj1, 'floor 1': obj2, 'basement': obj3} I have a list. a_list = ['floor 1', 'ground', 'basement'] I want to sort dictionary a using its keys based on the list. Is it possible to do that? i.e.: sort(a).based_on(a_list) #this is wrong. But I want something like this. The output doesn't have to be another dictionary, I don't mind converting the dictionary to tuples and then sort those. 回答1: The naive way, sorting the list of (key, value) tuples, using the

问题 I'd like to sort by one property and then by another (if the first property is the same.) What's the idiomatic way in Haskell of composing two comparison functions, i.e. a function used with sortBy ? Given f :: Ord a => a -> a -> Ordering g :: Ord a => a -> a -> Ordering composing f and g would yield: h x y = case v of EQ -> g x y otherwise -> v where v = f x y 回答1: vitus points out the very cool instance of Monoid for Ordering . If you combine it with the instance instance Monoid b => Monoid

问题 This question already has answers here : How to sort a list by a private field? (10 answers) Closed 18 days ago . Struggling to figure out how to access private attributes outside of a class in Java, using comparator. I'm using some code online as reference. If you change the private to public it works, but I need to know how to make it work with the variables set as private. // Java program to demonstrate working of Comparator // interface import java.util.*; import java.lang.*; import java

问题 This question already has answers here : How to sort a list by a private field? (10 answers) Closed 18 days ago . Struggling to figure out how to access private attributes outside of a class in Java, using comparator. I'm using some code online as reference. If you change the private to public it works, but I need to know how to make it work with the variables set as private. // Java program to demonstrate working of Comparator // interface import java.util.*; import java.lang.*; import java

问题 i have a list like this : List<string> list_lines = new List<string>(); list_lines.add("name1__pass1__com__14__55"); list_lines.add("name2__pass2__com__14__5445"); list_lines.add("name3__pass3__com__14__456456"); list_lines.add("name4__pass4__com__14__1357"); list_lines.add("name5__pass5__com__14__20000"); list_lines.add("name6__pass6__com__14__25"); list_lines.add("name7__pass7__com__14__12"); and more... as you see there is a separator here -> "__" in every string in that list. mean :

问题 This question already has answers here : How to compare Unicode strings in Javascript? (6 answers) Closed 5 years ago . I'm using the following script in order to sort (alphabetically) columns in HTML tables. The script works like a charm except that I don't have full control of non-English characters. If I have a word beginning with “Ü” for example, this is not treated like a “U” (as it should be). There is an easy way to transliterate characters before performing the sorting (like ü->u, ä-

问题 This question already has answers here : How to compare Unicode strings in Javascript? (6 answers) Closed 5 years ago . I'm using the following script in order to sort (alphabetically) columns in HTML tables. The script works like a charm except that I don't have full control of non-English characters. If I have a word beginning with “Ü” for example, this is not treated like a “U” (as it should be). There is an easy way to transliterate characters before performing the sorting (like ü->u, ä-