Recent questions tagged Data

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data structures - What is the left-child, right-sibling representation of a tree? Why would you use it?

Many data structures store multi-way trees as binary trees using a representation called the "left-child, right-sibling ... would you use it? See Question&Answers more detail:os...

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

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data structures - Searching a number in a rotated sorted Array

Given a Sorted Array which can be rotated find an Element in it in minimum Time Complexity. eg : Array contents ... Assume you search 8 in it. See Question&Answers more detail:os...

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

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data structures - How do I instantiate a Queue object in java?

When I try: Queue<Integer> q = new Queue<Integer>(); the compiler is giving me an error. Any help? Also ... implement the methods of the queue? See Question&Answers more detail:os...

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

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data structures - Are duplicate keys allowed in the definition of binary search trees?

I'm trying to find the definition of a binary search tree and I keep finding different definitions everywhere. ... no duplicate keys exist. See Question&Answers more detail:os...

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

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data structures - Difference between binary tree and binary search tree

Can anyone please explain the difference between binary tree and binary search tree with an example? See Question&Answers more detail:os...

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

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data structures - Java: Avoid inserting duplicate in arraylist

I am novice to java. I have an ArrayList and I want to avoid duplicates on insertion. My ArrayList is ArrayList< ... HashMap but I have no clue. See Question&Answers more detail:os...

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

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data annotations - Entity Framework code first unique column

I am using Entity Framework 4.3 and using Code Fist. I have a class public class User { public int ... of configuration file if possible. See Question&Answers more detail:os...

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

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data structures - How do you implement a circular buffer in C?

I have a need for a fixed-size (selectable at run-time when creating it, not compile-time) circular buffer ... the count. delete a buffer. See Question&Answers more detail:os...

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

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data structures - Best algorithm to test if a linked list has a cycle

What's the best (halting) algorithm for determining if a linked list has a cycle in it? [Edit] Analysis of ... algorithm to detect cycles in a directed graph". Question&Answers:os...

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

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data structures - Sorted array list in Java

I'm baffled that I can't find a quick answer to this. I'm essentially looking for a datastructure in ... : This class breaks the contract required by List Question&Answers:os...

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

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data migration - How to move Jenkins from one PC to another

I am currently using Jenkins on my development PC. I installed it on my development PC, because I had limited ... from my current PC to my new server? Question&Answers:os...

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

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data structures - What is the best way to combine two lists into a map (Java)?

It would be nice to use for (String item: list), but it will only iterate through one list, and you'd ... a clearer way? Maybe in the collections API somewhere? Question&Answers:os...

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

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data structures - Efficient (and well explained) implementation of a Quadtree for 2D collision detection

Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Question&Answers:os...

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

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data manipulation - Read a CSV from github into R

I am trying to read a CSV from github into R: latent.growth.data <- read.csv("https://github.com/aronlindberg/ ... to make it work. What am I doing wrong? Question&Answers:os...

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

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data structures - Time complexity of python set operations?

What is the the time complexity of each of python's set operations in Big O notation? I am using Python' ... finding the time complexity of all set operations. Question&Answers:os...

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

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data binding - WPF CommandParameter is NULL first time CanExecute is called

I have run into an issue with WPF and Commands that are bound to a Button inside the ... .live.com/self.aspx/Code%20samples/CommandParameterBinding.zip Question&Answers:os...

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

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data structures - Objects vs arrays in Javascript for key/value pairs

Say you have a very simple data structure: (personId, name) ...and you want to store a number of these ... shows the most common situation: non-sequential ids. Question&Answers:os...

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

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data structures - How to keep an Javascript object/array ordered while also maintaining key lookups?

I have some data which I originally stored in a generic Javascript object, with the ID as a key: { "7": ... the object is pretty large (hundreds of elements). Question&Answers:os...

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

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data structures - JavaScript hashmap equivalent

As made clear in update 3 on this answer, this notation: var hash = {}; hash[X] does ... objects with equivalent string representations overwrite each other. Question&Answers:os...

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

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data binding - When should I use # and = in ASP.NET controls?

I have been using ASP.NET for years, but I can never remember when using the # and = are appropriate. ... Is # only used in controls that support databinding? Question&Answers:os...

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

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data structures - What do I use for a max-heap implementation in Python?

Python includes the heapq module for min-heaps, but I need a max heap. What should I use for a max-heap implementation in Python? Question&Answers:os...

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

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data files - gnuplot: load datafile 1:1 into datablock

How can I read a datafile as-is (or 1:1) into a datablock? And how could I do this platform independently? ... anybody explain why and how to solve this issue? Question&Answers:os...

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

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data structures - Looking for C++ STL-like vector class but using stack storage

Before I write my own I will ask all y'all. I'm looking for a C++ class that is almost exactly like a STL ... the code using the vector so I gave up on it. Question&Answers:os...

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

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data structures - What does C++ struct syntax "a : b" mean

If I have a C++ struct, defining a 64bit data word such as.. struct SMyDataWord { int Name : 40; int Colour ... being used, but I've not come across it before. Question&Answers:os...

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

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data structures - How can I implement a tree in Python?

I am trying to construct a General tree. Are there any built-in data structures in Python to implement it? Question&Answers:os...

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

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data structures - Why does the C++ STL not provide any "tree" containers?

Why does the C++ STL not provide any "tree" containers, and what's the best thing to use instead? I want ... than use a tree as a performance enhancement... Question&Answers:os...

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

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data structures - Array versus linked-list

Why would someone want to use a linked-list over an array? Coding a linked-list is, no doubt, a ... question is concerned with the general data structures. Question&Answers:os...

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

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data structures - How do you implement a Stack and a Queue in JavaScript?

What is the best way to implement a Stack and a Queue in JavaScript? I'm looking to do the shunting-yard algorithm and I'm going to need these data-structures. Question&Answers:os...

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

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