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list - Inorder Binary Tree Traversal (using Python)

I am trying to perform an inorder traversal of a tree. The code itself feels right, except it is not working ... explanation. Thank you so much! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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list - How do I concatenate strings from a subquery into a single row in mysql?

I have three tables: table "package" -------------------------------------------- ... `package`.`package_id`) GROUP BY `ao_package`.`package_id` See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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list of schema with sizes (relative and absolute) in a PostgreSQL database

I'm looking for a query that returns a result of the form for any database (see example below supposing total ... success with that thus far. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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list - Why is Java's AbstractList's removeRange() method protected?

Does anyone have any idea, why removeRange method in AbstractList (and also in ArrayList) is protected? It looks ... quite inexplicable to me. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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list - How to add multiple objects to ManyToMany relationship at once in Django ?

Based on the Django doc, I should be able to pass multiple objects at once to be added to a manytomany relationship ... than use a for loop ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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list - Finding the longest contiguous sublist in Prolog

I'm a beginner in Prolog and this is my question: I have a sorted list of integers without duplicates i.e. [1,2,3, ... Lst = [21,22,23,24,25]. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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list - "Or" procedure in prolog

I'm doing a prolog program for college that is a bit like the cluedo game. I have six suspects with ... . Any help would be appreciated. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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list - While fetching all links,Ignore logout link from the loop and continue navigation in selenium java

I am fetching all the links in the page and navigating to all links. In that one of the link is Logout. How do i skip/ ... ++++++++++++++"); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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list - Prolog getting head and tail of string

I'm trying to wrap my brain around Prolog for the first time (SWI-Prolog) and I'm struggling with what ... . this currently just returns false. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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list - Unexpected behavior for python set.__contains__

Borrowing the documentation from the __contains__ documentation print set.__contains__.__doc__ x.__contains__(y) <==> y in ... bug or a feature? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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list - selenium.common.exceptions.InvalidArgumentException: Message: invalid argument error invoking get() with urls read from text file with Selenium Python

I have a list of URLs in a .txt file that I would like to run using selenium. Lets say that the file name is ... on how to re-write the code? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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list - How to get the first value in a python dictionary

I have a dictionary like this: myDict = { 'BigMeadow2_U4': (1609.32, 22076.38, 3.98), 'MooseRun': (57813.48, ... = [1609.32,57813.48,991.31] See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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list - Android - Get each EditTexts values of ListView with custom ArrayAdapter

I've got a ListView with a customer ArrayAdapter and a custom ListItem-XML. At the bottom of this ListView I' ... in advance for the responses. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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list - CSS class priorities

I have a question about the priority of CSS classes after encountering a problem today. The situation is as ... selectedItem">xxxx</li> See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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list comprehension - Understanding Haskell's fibonacci

fibs :: [Int] fibs = 0 : 1 : [ a + b | (a, b) <- zip fibs (tail fibs)] This generates the Fibonacci ... 't understand <-. What is it doing here? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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list - Python Running cumulative sum with a given window

What I want to do is generate a numpy array that is the cumulative sum of another numpy array given a certain ... sum with a window of 400. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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list - How do I generate a Cartesian product in Java?

I have a number of ArrayList with each ArrayList having objects and each one can have different length. I need to ... e, Can anyone help me? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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list - Improving pure Python prime sieve by recurrence formula

I am trying to optimize further the champion solution in prime number thread by taking out the complex formula ... from number list version. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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list - CSS horizontal menu - equally spaced?

I have a standard CSS menu, made with UL and LI tags. I need them to get to cover the whole ... creating them without using JavaScript later. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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list - Why use two stacks to make a queue?

I can see the advantage of using two stacks if an array implementation is used since stacks are more easily ... -list and array implementations. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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list - array filter in python?

For example, I have two lists A = [6, 7, 8, 9, 10, 11, 12] subset_of_A = [6, 9, 12]; # the subset ... a built-in function in python to do this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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list - random.choice from set? python

I'm working on an AI portion of a guessing game. I want the AI to select a random letter from this ... random.choice(allLetters) print (aiGuess) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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list - UnsupportedOperationException at java.util.AbstractList.add

I'm having issues getting a block of code to run properly. I'm not entirely sure WHAT this code does (I'm ... ) Thanks in advance for any help. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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list - Python class accessible by iterator and index

Might be a n00b question, but I currently have a class that implements an iterator so I can do something like for ... can I do that? Thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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list - Problems with Pattern matching, implementing SplitAt in scala

I am trying to implement the scala splitAt using pattern matching and this is what I am trying to do: ... the unreachable code error. Thanks See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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list - Basic indexing recurrences of a substring within a string (python)

I'm working on teaching myself basic programming. One simple project is to find the index of recurrences of a substring ... [[1]] Any thoughts? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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list - Getting result of a spawned function in Erlang

My objective at the moment is to write Erlang code calculating a list of N elements, where each element is a ... it better. Thanks in advance. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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list - A faster way of generating combinations with a given length, preserving the order

TL;DR: I want the exact behavior as filter ((== 4) . length) . subsequences. Just using subsequences ... would like to understand the source. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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