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How to draw grid using swing class Java and detect mouse position when click and drag

I am trying to create a grid UI (5*5) using Swing classes. I tried a nested loop and adding a jPanel ... change the colour of a chosen cell. See Question&Answers more detail:os...

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

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ios - What does deployment target mean?

this is a very simple question I'm assuming. Can someone tell me what deployment target means. If I choose ... on a lower deployment target. See Question&Answers more detail:os...

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

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IntelliJ: Viewing diff of all changed files between local and a git commit/branch

Using IntelliJ's diff viewer is a very nice way to review code because you can make changes in your local version ... know how to 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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.net - How to create a sequence of integers in C#?

F# has sequences that allows to create sequences: seq { 0 .. 10 } Create sequence of numbers from 0 to 10. Is there something similar in C#? See Question&Answers more detail:os...

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

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python - When import docx in python3.3 I have error ImportError: No module named 'exceptions'

when I import docx I have this error: >File "/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/site-packages/ ... .3, docx 0.2.4)? See Question&Answers more detail:os...

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

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javascript - Adding extra zeros in front of a number using jQuery?

I have file that are uploaded which are formatted like so MR 1 MR 2 MR 100 MR 200 MR 300 ETC. What i need ... 076 ETC. Any help would be great! See Question&Answers more detail:os...

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

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c# - MemoryStream - Cannot access a closed Stream

Hi why using (var sw = new StreamWriter(ms)) returns Cannot access a closed Stream exception. Memory Stream is on ... way to fix it ? 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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linux - How to escape a single quote in single quote string in Bash?

I want to display a string in Bash like this I'm a student Of course you can do it like this echo "I ... using single quote around the string ? See Question&Answers more detail:os...

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

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java - Flattening a collection

Say I have a Map<? extends Object, List<String>> I can get the values of the map easily enough, and iterate ... = SomeMap.values().flatten(); See Question&Answers more detail:os...

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

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How to convert JSON string into List of Java object?

This is my JSON Array :- [ { "firstName" : "abc", "lastName" : "xyz" }, { "firstName" : "pqr", ... of com.aa.Student out of START_ARRAY token See Question&Answers more detail:os...

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

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In C# WPF, why is my TabControl's SelectionChanged event firing too often?

I have a tabbed GUI with each tab containing a Frame. In one of these Frames there is a DataGrid. When the ... problem. What is causing 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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What defines an opaque type in C, and when are they necessary and/or useful?

I've seen the concept of 'opaque types' thrown around a bit but I really haven't found a succinct answer ... solve with their existence. 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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python - Use index in pandas to plot data

I have a pandas-Dataframe and use resample() to calculate means (e.g. daily or monthly means). Here is ... DataFrame monthly_mean as the x-axis? See Question&Answers more detail:os...

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

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102 views

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How to deal with Git "Could not read" error

I am getting this error in my git repository: 22:09:15 $ git status # ... dangling tree 0259d2d38b18b6136bb6070fb41faf3624453cc6 See Question&Answers more detail:os...

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

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What is the underlying type of a c++ enum?

This may have been answered elsewhere but I could not find a suitable response. I have this code: enum ... WP_FINISHED = 0x0040, }; See Question&Answers more detail:os...

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

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289 views

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python - Pandas "Group By" Query on Large Data in HDFStore?

I have about 7 million rows in an HDFStore with more than 60 columns. The data is more than I can fit ... for grouping data in an HDFStore? See Question&Answers more detail:os...

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

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security - How to properly logout of a Java EE 6 Web Application after logging in

A pretty simple requirement. After logging into web J2EE 6 application, how can I have the user logout again? ... the session times out, etc? See Question&Answers more detail:os...

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

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511 views

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animation - IPhone Text Glow Effect

In my IPhone application, I want the text in UILabel to glow for a second, then fade for a sec;. Also i want ... 3 or 4 times. Is this 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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scripting - CMD.EXE batch script to display last 10 lines from a txt file

Any ideas how to echo or type the last 10 lines of a txt file? I'm running a server change log script to ... to pipe more lines to the screen. See Question&Answers more detail:os...

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

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objective c - Core Data Predicate Date Comparison

Im trying to fetch all the objects in an entity matching a user selectedDate (it's an NSDate). The Core Data ... (eDate = %@)", selectedDate]; See Question&Answers more detail:os...

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

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253 views

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android - How to disable the Recent Tasks/Apps button

I'm building a child play application for Android. I need to disable all keys when it is in use. I have set the ... can't seem to figure it out. See Question&Answers more detail:os...

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

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How is testing the registry pattern or singleton hard in PHP?

Why is testing singletons or registry pattern hard in a language like PHP which is request driven? You can write ... . Am I missing something? See Question&Answers more detail:os...

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

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569 views

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macos - Widget "flip" behavior in Core Animation/Cocoa

I'm trying to make a Card class that duplicates the behavior of Dashboard widgets in that you can put controls ... The card example uses images. See Question&Answers more detail:os...

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

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pdf - How to add PDFBox to an Android project or suggest alternative

I'm attempting to open an existing pdf file and then add another page to the pdf document from within an ... I imported it correctly? 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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899 views

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datetime - Javascript show milliseconds as days:hours:mins without seconds

I'm calculating the difference between 2 dates for which there are many differing examples available. The time ... into days.hours:minutes. See Question&Answers more detail:os...

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

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640 views

1 answer

api - Yii2 REST query

Hy. I have a ProductController which extends the yii estActiveController. Question is that how can i make querys ... products with name iphone. See Question&Answers more detail:os...

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

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602 views

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c# - Check if a string is a palindrome

I have a string as input and have to break the string in two substrings. If the left substring equals the right ... = "ank" (after reversal). See Question&Answers more detail:os...

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

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621 views

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python - Efficiently Calculating a Euclidean Distance Matrix Using Numpy

I have a set of points in 2-dimensional space and need to calculate the distance from each point to each ... populating a full distance matrix. See Question&Answers more detail:os...

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

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