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linux - How "sudo" command works?

My understand is that sudo is executes a given command with root privileges, but I experienced that entering a ... su (substitute/switch user)? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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I want to run a background process for internet checking in Android

I want a background process like async task which runs in the background. How to run internet connection ... background process in Android? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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macos - What is the difference between installing packages with Python 3 and pip3 in terminal?

I have two versions of Python on my Mac: 2.7 and 3.8. When installing packages, I use pip3 instead of ... pip versions which was a bit strange. See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Knockout switch-case plugin is not hiding/showing the correct value

I'm using the knockout-switch-case extension plugin, and I am having a difficult time getting it to work with ... in use of this plugin? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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c# - Unity3D: How to do object pooling without a spawner singleton

Usually, if you use object pooling, you make a singleton like in this video. After seeing this video, I ... I wanna instead use Events. See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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java - System.in points to JtextArea and using Scanner with it causes application to hang

I've got a JFrame that contains a single JPanel that contains a single JTextArea. I've successfully managed to point ... } }); return area; } See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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asp.net mvc - MVC Areas not render _Layout

I have the MVC project with .NET CORE 2.2 I add Areas in my project it work properly when in the local ... , can someone help. where goes wrong See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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.net - Complex Regular expression for two consecutive words or a single word. C#

I have a list of every city in the world in my Database, and have an application written in C# that needs ... Thanks for any help in advance. See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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How to read/ add/ print a number string in Haskell

Below if my code right now. I want to be able to take in user input like the following: "6 1 2 3 4 5 ... :: Int) print (numberInt*4) main See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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setSupportActionBar cannot be applied to android.support.v7.widget.Toolbar

On this new project, when setting a toolbar into the main activity java file, it gets the error on " ... missing something? A compatibility set? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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php - Storing special characters in DB in such a way to display properly on site and still find image with the same name

I have a site where users can change their location. I have all of the available countries stored in a DB and ... the image of the same name. See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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sql - Postgres - aggregate information once and add add multiple properties as columns

I have a table called project and a view called downtime_report_overview. The downtime_report_overview consists of ... " ... See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Short hand to change variable with function

I was wondering if there's a way of changing some variable value with the return of some function. A short-hand-way ... of doing this line <---- See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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java - Finding modes an an array

Does anyone know how to find the modes in an array when there are more then one mode? I have this code that ... new Integer[modes.size()]); } See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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multithreading - How do I box Arc and Mutexed variables?

The following code gets some variables in closures and returns a struct containing that data. I can't return the struct ... ).clone(), })) } See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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Displaying result for a particular record through PHP- MySQL Search

After using the search criteria for my database search, I do get the desired records, but I dont want ... that particular processed sql query! See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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python - file modifiaction and manipulation

How would you scan a dir for a text file and read the text file by date modified, print it to screen ... need string or buffer, list found. See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Angular - passing function between components

Here is my issue skeleton: https://stackblitz.com/edit/angular-jk8dsj I have two problems in this task: I want ... and sending data to server? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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swing - Passing input from one frame to another(JAVA)

Here's the thing... I have 2 GUI programs. A Menu Program,which is basically a frame with buttons of food ... How can I solve this problem? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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bash - Correct syntax and usage of `cat` command?

(This question is a follow-up on this comment, in an answer about git hooks) I'm far too unskilled in bash (so ... " $(cat $tmp) > "$1" See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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tsql - SQl server duplicate joins issue with different elements

Sorry, I am posting again with one more requirement. can anyone please help: I tried to join with duplicate values but ... ',105.6,105.6, True) See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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java - Get file from relative path in windows

I am trying to access .doc a file from my project directory. I am getting an error when I use a relative path ... a relative path, can you help? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Why are runtime.js, styles.js created on ng serve command

Greetings fellow programmers I am new to angular and I wanted to know why are these two files created when I ... files. Any help is appreciated. See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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python - UnboundLocalError when assigning function result to variable named the same as the function

Why am I getting UnboundLocalError: local variable 'heatmap' referenced before assignment in the below script on the ... heatmap print(run()) See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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python - How to type @ using pyautogui

I am using pyautogui in python 2.7.x and I need to write the character "@". I've tried everything I know but ... s should let me write the "@"? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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c# - Why tuple type is not accepted as a multidimensional array index?

I'm wondering why this is not working the way I expect it to work. Is this just the matter of "to ship ... for this not to be supported? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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excel - VLookUp value to another worksheet

I need to get the value of the corresponding item in Lookup table. But, I am getting N/A in my ... Screenshot for Sheet1: Screenshot for VLookup See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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java - String index value access

This problem is related to String and array in Java. Say I have a String S= abcd. I have an array index[]={2}. ... , so it's replaced by "ffff". See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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