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data structures - Implement an immutable deque as a balanced binary tree?

I've been thinking for a while about how to go about implementing a deque (that is, a double-ended queue) ... way of implementing deques na?ve? See Question&Answers more detail:os...

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

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758 views

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data structures - How would you represent a Rubik's Cube in code?

If you were developing software to solve a Rubik's Cube, how would you represent the cube? See Question&Answers more detail:os...

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

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555 views

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data structures - Difference between red-black trees and AVL trees

Can someone please explain what the main differences between these two data structures are? I've been trying to find ... to use than the other? See Question&Answers more detail:os...

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

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706 views

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data structures - What is the difference between a map and a dictionary?

I know a map is a data structure that maps keys to values. Isn't a dictionary the same? What is the ... what is their difference in theory. See Question&Answers more detail:os...

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

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675 views

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data binding - UI5: Formatter called multiple times or too soon from an XML view

I'm using OpenUI5. Using the formatter.js, I have formatted some text in my view. But my formatter is called 3 ... country": "California" } } } See Question&Answers more detail:os...

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

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991 views

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data binding - Android Databinding : package does not exist

I'm trying to use data-binding with Android. I can not anymore build my project. I got this error : " ... output : https://pastebin.com/w93Rausg See Question&Answers more detail:os...

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

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538 views

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data binding - WPF. Find control that binds to specific property

Any ideas on how to implement a method that given a propertyname, finds a control (perhaps from a visualtree) ... bound to the given property? See Question&Answers more detail:os...

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

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798 views

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data binding - How to set WPF string format as percent wihout multiplying by 100?

I have a textbox bound to a property in an object. I have setup the string format to be p0. However, when I ... format for 7 is 7% not 700% ? See Question&Answers more detail:os...

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

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797 views

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data structures - Multi-key dictionaries (of another kind) in C#?

Building on this question, is there a simple solution for having a multi-key dictionary where either key ... , Exception or null returned See Question&Answers more detail:os...

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

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662 views

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data structures - Algorithm for merging two max heaps?

Is there an efficient algorithm for merging 2 max-heaps that are stored as arrays? See Question&Answers more detail:os...

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

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733 views

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data structures - C# Priority Queue

I'm looking for a priority queue with an interface like this: class PriorityQueue<T> { public void Enqueue(T ... .net structure would be nice. See Question&Answers more detail:os...

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

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676 views

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data binding - Android Spinner databind using array list

I have a array list like this: private ArrayList<Locations> Artist_Result = new ArrayList<Location>(); This ... for that spinner controller. See Question&Answers more detail:os...

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

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872 views

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data binding - WPF DataGrid RowHeader databinding

I have a DataGrid, bound to a DataTable. I want to display text in the RowHeader, to achieve something like this: ... so, how can I do this? See Question&Answers more detail:os...

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

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629 views

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data visualization - How can I generate ascii "graphical output" from R?

I believe R can generate stem-and-leaf for ascii histograms, and scatter plots using this code from Matt Shotwell. ... , like this from GNUPlot? See Question&Answers more detail:os...

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

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699 views

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data binding - WPF TabControl Databinding

I'm trying to build a WPF user interface containing a TabControl, and a TextBlock. I want to bind these two ... How can I achieve this result? See Question&Answers more detail:os...

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

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761 views

1 answer

data binding - ASP.NET Repeater bind List<string>

I am binding a List<string> to a Repeater control. Now I want to use the Eval function to display the contents ... I should use instead of NAME. See Question&Answers more detail:os...

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

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501 views

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data modeling - ExtJS 4: Models with Associations and Stores

Introduction I'm facing an application design problem with the Ext.data.Model class in ExtJS. I will try to ... Thank you in advance -Konrad See Question&Answers more detail:os...

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

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594 views

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data structures - Linked List vs Vector

Over the past few days I have been preparing for my very first phone interview for a software development job ... pointer to neighbor) 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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514 views

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data structures - What's a RDF triple?

In layman's terms, what's a RDF triple? See Question&Answers more detail:os...

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

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1.1k views

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data binding - Animate WPF Datatemplate when item added to Listbox?

In my project I have a WPF Listbox bound to an ObservableCollection. Every time I add a new item to the ... a new item/datatemplate is added? See Question&Answers more detail:os...

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

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684 views

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data structures - Binary Search Tree - Java Implementation

I'm writing a program that utilizes a binary search tree to store data. In a previous program (unrelated), I ... need to "start from scratch"? See Question&Answers more detail:os...

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

0 votes

612 views

1 answer

data structures - Get keys from HashMap in Java

I have a Hashmap in Java like this: private Map<String, Integer> team1 = new HashMap<String, Integer>(); Then ... .getKey() to return "United". See Question&Answers more detail:os...

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

0 votes

528 views

1 answer

data structures - Why does Dijkstra's algorithm use decrease-key?

Dijkstra's algorithm was taught to me was as follows while pqueue is not empty: distance, node = pqueue ... between the two approaches? See Question&Answers more detail:os...

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

0 votes

613 views

1 answer

data structures - How do I represent a hextile/hex grid in memory?

Say I'm building a board game with a hextile grid, like Settlers of Catan: Note that each vertex and edge ... 's neighbors, edges and vertices? See Question&Answers more detail:os...

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

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461 views

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data structures - Designing a web crawler

I have come across an interview question "If you were designing a web crawler, how would you avoid getting into ... etc work, but any guesses? See Question&Answers more detail:os...

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

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603 views

1 answer

data structures - `cannot move out of dereference of `&mut`-pointer` while building a sorted linked list

So, I'm learning Rust and decided to build a sorted linked list. Everything looks nice until I reach the add ... the nightly from 21/12/14. See Question&Answers more detail:os...

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

0 votes

531 views

1 answer

data structures - Why are entries in addition order in a .Net Dictionary?

I just saw this behaviour and I'm a bit surprised by it... If I add 3 or 4 elements to a Dictionary, ... does anyone know how this really works? See Question&Answers more detail:os...

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

0 votes

646 views

1 answer

data structures - KDTree Implementation in Java

I'm looking for a KDTree implementation in Java. I've done a google search and the results seem ... a good nearest-neighbors implementation. See Question&Answers more detail:os...

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

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