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Removing duplicates from a String in Java

I am trying to iterate through a string in order to remove the duplicates characters. For example the String aabbccdef ... What is the best way to do this? Question&Answers:os...

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

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c++ - How to open an std::fstream (ofstream or ifstream) with a unicode filename?

You wouldn't imagine something as basic as opening a file using the C++ standard library for a Windows application ... here ? Especially a cross-platform one ? Question&Answers:os...

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

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JavaScript "cannot read property "bar" of undefined

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

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rust - How do I collect into an array?

I want to call .map() on an array of enums: enum Foo { Value(i32), Nothing, } fn main() { let bar = [1, 2, ... not implemented for `[Foo; 3]` How do I do this? Question&Answers:os...

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

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wpf - How do you animate a line on a canvas in C#?

How would you make a line slowly draw across the screen? I am trying to animate a line on a canvas in a C#/WPF ... . I would like to use C# code and not XAML. Question&Answers:os...

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

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java - Why does integer division code give the wrong answer?

I have a very simple division in Java (it's a product quantity / production per hour), however whenever I ... errors?? Any help will be greatly appreciated. Question&Answers:os...

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

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multithreading - Does lock xchg have the same behavior as mfence?

What I'm wondering is if lock xchg will have similar behavior to mfence from the perspective of one thread ... mutexes help you see the most recent value? Question&Answers:os...

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

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winforms - Why the form load can't catch exception?

Is this a bug in Winforms? (tested on both VS2008 and VS2010) private void Form1_Load(object sender, EventArgs e) ... string t = s.ToCharArray().TakeWhile... Question&Answers:os...

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

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java - JUnit: How to simulate System.in testing?

I have a Java command-line program. I would like to create JUnit test case to be able to simulate System.in. ... users. How do I simulate that in JUnit? Thanks Question&Answers:os...

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

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c# - Deserializing JSON when sometimes array and sometimes object

I'm having a bit of trouble deserializing data returned from Facebook using the JSON.NET libraries. The JSON returned ... in my converter? Thanks for any help. Question&Answers:os...

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

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Palindrome check in Javascript

I have the following: function checkPalindrom(palindrom) { for( var i = palindrom.length; i > 0; i-- ) { if( ... I want to check if the word is a palindrome. Question&Answers:os...

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

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performance - What happens after a L2 TLB miss?

I'm struggling to understand what happens when the first two levels of the Translation Lookaside Buffer result in ... whether they only reside in main memory. Question&Answers:os...

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

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199 views

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Inverse dictionary lookup in Python

Is there any straightforward way of finding a key by knowing the value within a dictionary? All I can think of is this: ... .items() if value == 'value'][0] Question&Answers:os...

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

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java - How to return multiple values?

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

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java - Using static variables in Android

In android, are using static variables a recommended practice? E.g, implementing a Singleton pattern in Java, I ... this get cleaned up by the Android JVM? Question&Answers:os...

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

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xml - PHP: How to handle <![CDATA[ with SimpleXMLElement?

I noticed that when using SimpleXMLElement on a document that contains those CDATA tags, the content is always NULL. ... cdata", but that didn't work. Question&Answers:os...

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

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370 views

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string - How to extract file name from path?

How do I extract the filename myfile.pdf from C:Documentsmyfile.pdf in VBA? Question&Answers:os...

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

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How to replace substrings in windows batch file

Can anyone tell me using batch file in windows ...how to read from a file and replace string=bath ... that the output is like hello Ahello Bhello XYZhelloABC Question&Answers:os...

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

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498 views

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python - Pandas cannot open an Excel (.xlsx) file

Please see my code below: import pandas df = pandas.read_excel('cat.xlsx') After running that, it gives me the following ... 2.0.1 and Pandas 1.1.5 installed. Question&Answers:os...

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

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392 views

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PHP warning: Call-time pass-by-reference has been deprecated

I am getting the warning: Call-time pass-by-reference has been deprecated for the following lines of code: function XML ... does it cause and how to fix it? Question&Answers:os...

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

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226 views

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Simulating MySQL's ORDER BY FIELD() in Postgresql

Just trying out PostgreSQL for the first time, coming from MySQL. In our Rails application we have a couple of ... have to pull sorting out into the code? Question&Answers:os...

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

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103 views

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How to change default validation error message in ASP.NET MVC?

Say I have this property in my model: [DisplayName("test")] [Required(ErrorMessage = "required")] public ... .DateTime, ErrorMessage = 'some other message')] Question&Answers:os...

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

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660 views

1 answer

python - Non blocking subprocess.call

I'm trying to make a non blocking subprocess call to run a slave.py script from my main.py program. I need to ... how to implement this in a simple fashion...? Question&Answers:os...

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

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1.2k views

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access parent object in javascript

var user = { Name: "Some user", Methods: { ShowGreetings: function() { // at this point i want to access variable " ... ??** }, GetUserName: function() { } } } Question&Answers:os...

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

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166 views

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How to implement shared memory in .NET?

I have a C++.NET app and a C#.NET app. I would like them to communicate via shared memory. How is it possible ... 2.0 ? Mainly want to share a queue object. Question&Answers:os...

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

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103 views

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performance - How are x86 uops scheduled, exactly?

Modern x86 CPUs break down the incoming instruction stream into micro-operations (uops1) and then schedule these uops out ... uops_dispatched_port_port_0 ( +- 0.50% ) 1,241,118,197...

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

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505 views

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shell - While-loop subshell dilemma in Bash

i want to compute all *bin files inside a given directory. Initially I was working with a for-loop: var=0 for ... $count files processed) " | tee -a entropy.txt Question&Answers:os...

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

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568 views

1 answer

tsql - Select query to remove non-numeric characters

I've got dirty data in a column with variable alpha length. I just want to strip out anything that is not 0- ... any advice on the best way to address this? Question&Answers:os...

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

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