Recent questions tagged data

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data binding - WPF DataTrigger - Setting ListBoxItem IsSelected

I have the following data trigger on the ListBoxItems in my Multi-selection ListBox <DataTrigger Value="True"> < ... /Trigger> </Style.Triggers> See Question&Answers more detail:os...

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

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data binding - Angular 2 modals shared between components

I have a typical Angular 2 app with many components. I installed this modal component: https://github.com/ ... class AppModule{} Stay tuned! See Question&Answers more detail:os...

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

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data recovery - How can I recover files after accidentally running "git clean -df"?

I have accidentally run git clean -df. It removed my files from my current commit, which I had yet to push. ... way to get those files back? See Question&Answers more detail:os...

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

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data recovery - How can I undelete a file using C#?

I'm trying to find some lost .jpg pictures. Here's a .bat file to setup a simplified version of my situation ... trying to approach it: C# 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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data structures - Why are hash maps better than trie maps?

By trie map I mean an associative array, where the payloads are stored in a trie instead of a hash table. When I ... I've never seen a trie map? See Question&Answers more detail:os...

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

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793 views

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data cleaning - Fill missing Values by a ratio of other values in Pandas

I have a column in a Dataframe in Pandas with around 78% missing values. The remaining 22% values are divided ... How do I accomplish 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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data structures - Stop ColdFusion from sorting my structs/arrays

I have data represented in CF as an array of structs e.g.: var foo = [{key = 'bar', value = 'baz ... is expected to be ordered. Any suggestions? See Question&Answers more detail:os...

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

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data structures - LinkedList Struct Typedef in C

I am try to build a basic linked list in C. I seem to get an error for this code: typedef struct { ... 't accept: openGame.next = &ruyLopez; See Question&Answers more detail:os...

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

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data structures - Hand-over-hand locking with Rust

I'm trying to write an implementation of union-find in Rust. This is famously very simple to implement in languages like ... { x.clone() } } See Question&Answers more detail:os...

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

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data structures - is there union and intersect Haskell Prelude implementation?

Is there in the Standard Prelude functions which implement the union and the intersection of sets ? union :: (Eq a) => [ ... b <- bs, elem b ns] See Question&Answers more detail:os...

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

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1.1k views

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data binding - How can I order Groups in WPF

In WPF, the CollectionViewSource allows for sorting (SortDescriptions) and grouping (GroupDescriptions). However, I can't ... . Is it possible? See Question&Answers more detail:os...

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

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data hiding in C++

I have some code in C, that uses incomplete structs this way ( simplified example ): something.h struct ... enlighten this mortal C coder? See Question&Answers more detail:os...

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

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823 views

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data structures - Is it necessary to convert infix notation to postfix when creating an expression tree from it?

I want to create an expression tree given expression in infix form. Is it necessary to convert the expression to postfix first ... : / * ^ + -. See Question&Answers more detail:os...

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

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721 views

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data structures - Explaining PHP Interface

Can you help to clarify PHP Interface for me. I get that the main point is so that multiple classes can ... it would be advantageous? 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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819 views

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data binding - Dynamically update ion.rangeSlider ngModel in AngularJS directive

I'm trying to update the value of an Ion.RangeSlider when its bound ng-model scope variable changes. The model updates ... "> </div> </div> See Question&Answers more detail:os...

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

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803 views

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data structures - Java: why TreeMap is called "Tree" map?

I can't understand why TreeMap is called TreeMap but not SortedMap. As I understand TreeMap is a map that auto sorts ... like a graph. So why? See Question&Answers more detail:os...

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

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868 views

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data binding - Is it possible to refer to column names via bind variables in Oracle?

I am trying to refer to a column name to order a query in an application communicating with an Oracle ... Any suggestions are much 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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764 views

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data structures - Is there any (unbounded) fair blocking queue in java?

Is there any implementation of blocking queue which guarantees fair take() operation if multiple consumers are removing ... but its bounded. See Question&Answers more detail:os...

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

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763 views

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data structures - Why is parameter to string.indexOf method is an int in Java

I am wondering why the parameter to indexOf method an int , when the description says a char. public int indexOf( ... it even more ! 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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833 views

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data structures - Getting reference of a sub-matrix in java

I need to do parallel processing of sub-matrices recursively (original matrix divided into 4 passed into a method). ... 't get an answer 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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646 views

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data mining - find all two word phrases that appear in more than one row in a dataset

We would like to run a query that returns two word phrases that appear in more than one row. So for e.g. ... a long list of English sentences. See Question&Answers more detail:os...

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

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793 views

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data structures - Is there a way to make an immutable reference mutable?

I want to solve a leetcode question in Rust (Remove Nth Node From End of List). My solution uses two ... while making the borrow checker happy? See Question&Answers more detail:os...

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

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778 views

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data binding - Spring usage of typeMismatch messages

I have done some searches on the web and in stackoverflow to see how to handle the following message that I ... numberFormat, false)); } 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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887 views

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data binding - How to set a value to display for bound properties in WPF design mode?

My bound contents are showed as empty string in the UI design-mode. I want to display some faked value for those ... know how to. Thank you! See Question&Answers more detail:os...

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

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726 views

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data structures - How to separate a List by a condition using Java 8 streams

Consider the following code: List<Integer> odd = new ArrayList<Integer>(); List<Integer> even = null; List< ... items based on the conditions. See Question&Answers more detail:os...

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

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782 views

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data structures - Java: Sorted collection which allows duplicates, is memory efficient and provides fast insert + update

Specifically I need a collection which uses one field A for accessing and a different one (field S) for ... "sorted+segmented array" solution. See Question&Answers more detail:os...

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

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583 views

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data modeling - Star schema, normalized dimensions, denormalized hierarchy level keys

Given the following star schema tables. fact, two dimensions, two measures. # geog_abb time_date amount value #1: AL ... being use? If not why? See Question&Answers more detail:os...

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

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602 views

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data representation - Representing dynamic typing in C

I'm writing a dynamically-typed language. Currently, my objects are represented in this way: struct Class { ... but you all received upvotes. See Question&Answers more detail:os...

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

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