Recent questions tagged data

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data structures - DAG vs. tree using Git?

I've often read that Git uses the directed acyclic graph (DAG) data structure, with each commit as a node ... specifically with regards to Git? 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 - Linked List in SQL

What's the best way to store a linked list in a MySQL database so that inserts are simple (i.e. you don't ... can easily be pulled out in order? 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 - Key-ordered dict in Python

I am looking for a solid implementation of an ordered associative array, that is, an ordered dictionary. I want ... insert. Any better ideas? 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 mining - Finding 2 & 3 word Phrases Using R TM Package

I am trying to find a code that actually works to find the most frequently used two and three word phrases in R ... works? Thank you so much! 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 - Quadtree for 2D collision detection

I'm trying to use a quadtree for 2D collision detection, but I'm a little stumped on how to implement it. ... this alright? Can it be improved? 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 - A proper way to create a matrix in c++

I want to create an adjacency matrix for a graph. Since I read it is not safe to use arrays of the ... like boost, is probably not appreciated. 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 binding - WPF Grid as ItemsPanel for a list dynamically bound to an ItemsControl

I am using a Grid as ItemsPanel for a list dynamically bound to an ItemsControl. The code below is working ... workarounds, but no solutions. 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 binding - How to bind xml to the WPF DataGrid correctly?

I have looked for and tried various solutions but so far none of them solve my problem. I am using the built-in ... see what I can get to work. 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 loss - How to recover deleted rows from SQL server table?

I accidentaly ran a DELETE command against a table with a wrong WHERE clause. I am using SQL Server 2005. Is ... help me recover the lost data? 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 - Automatically sorted by values map in Java

I need to have an automatically sorted-by-values map in Java - so that It keeps being sorted at any time while I ... map's size to 1 mil always. 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 binding - WPF - Bind to Item Index from within ItemTemplate of ItemsControl?

Is there a way to bind to the ItemIndex from within the ItemTemplate of an ItemsControl? For example: ... .ItemTemplate> </ItemsControl> 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 - Does a standard implementation of a Circular List exist for C++?

I want to use a circular list. Short of implementing my own (like this person did) what are my ... can always dereference this iterator." 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 - Efficient implementation of immutable (double) LinkedList

Having read this question Immutable or not immutable? and reading answers to my previous questions on immutability, I ... advance for your help. See Question&Answers more detail:os...

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

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683 views

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data structures - How is vector implemented in C++

I am thinking of how I can implement std::vector from the ground up. How does it resize the vector? realloc only ... old stucts, or am I wrong? See Question&Answers more detail:os...

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

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473 views

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data visualization - Network chord diagram woes in R

I have some data similar to the data.frame d as follows. d <- structure(list(ID = c("KP1009", " ... limited options to modify the aesthetics. See Question&Answers more detail:os...

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

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701 views

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data binding - How to bind a command in WPF to a double click event handler of a control?

I need to bind the double click event of a textblock (or potentially an image as well - either way, its a ... to my commands, any help? See Question&Answers more detail:os...

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

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