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I want to know, why this is O(n2) for 1+2+3+...+n? For example, 1+2+3+4 = 4·(4+1)/2 = 10 but 42=16, so how come it's O(n2)? 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 do I keep my rails integer from being converted to binary?

As you may be able to see in the image, I have a User model and @user.zip is stored as an integer for ... , but please inform me if otherwise. See Question&Answers more detail:os...

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

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jsf 2 - Wrong selected option for selectOneMenu with POJOs and Converter

in our company we're hitting a serious problem which we think is a serious design flaw of the JSF spec, if ... be able to use this construct. See Question&Answers more detail:os...

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

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batch file - How to I start example.txt as a Notepad or a Word document through cmd

Im trying to start a given file as a notepad or a word document, not open a new notepad or word document See Question&Answers more detail:os...

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

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sorting - Java: Variable is already defined in method main

So I have been the following error every time I try to compile my .java file "error: variable max is already ... ; } } //Sorting algorithm end See Question&Answers more detail:os...

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

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Overflow error in Python program

Please help me to understand why this code doesn't work. I know there is something very stupid wrong. This should be an ... k1+2*k2+2*k3+k4)/6 See Question&Answers more detail:os...

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

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go - Unable to run Golang application on Docker

I am trying to run this project - https://github.com/JumboInteractiveLimited/codetest I've downloaded the Docker tool ... 13:51:53 Waiting... See Question&Answers more detail:os...

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

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r - How to calculate a condition using dplyr?

I want to calculate the following condition using dplyr a) When the normal minimum temperature is equal to 10°C ... be achieved using dplyr? 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 - Loading message instead of timeout while executing a heavy query

I'm running Zend server and ZF1 with db2 database. For some export, the queries take a very long time (>50 ... query. 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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logging - Android Studio - logcat

Can someone tell me what is wrong with my app it crashes on statr . Here is the LogCat: Process: com. ... .java:781) at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)...

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

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html - How to put form element (search bar) into the center of the navbar?

<nav class="navbar navbar-light bg-light"> <a class="navbar-brand" href="#"> <img src="/docs/4.4/assets/ ... bar in the center of the Navbar? 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 - Change the URL on page refresh

I m currently on a page www.example123.com/search?error=1 . On page refresh, the page should be loaded ... should work in all major browsers. 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 - Converting many .txt files into csv and combining them

I have many .txt files. I want to convert a few files ending with specific names into csv and combine them into ... . 2.432250e-05 4.111400e+04 See Question&Answers more detail:os...

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

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Which platform is used in companies now-a-days to implement mobile applications?

Basically i would like to know which platform is currently used to develop mobile applications i.e. J2ME etc ... would be quite helpful. See Question&Answers more detail:os...

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

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Cuda: Compact and result size

I am attempting to use CUDA to find the distance between objects with 3D coordinates. That said, I am only ... I'd appreciate the 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 - Banned words but not if with more words

I find solution, to ban some words if they are entered in input field. The problem is that i need ban them ... : http://jsfiddle.net/p16954wc/ 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++ - boose wait_for_any with asio io-service...how can i return future suitable for wait_for_any?

i have code which use asio coroutine to get file using http get asynchronously. now i try to modify this code to get 24 files , ... != 0) { ////4-2-2020 m_formatting_ostream << "R...

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

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python - Forecasting basis the historical figures

I want to forecast the allocations basis the historical figures. Manual Input provided by the user: year month x ... x'].apply(func) 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 - Turn an array of values into an array of variables

Update After the initial feedback I got that my question is unclear, I decided to start over and ask it with ... moving on is not an option. 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 pass php in javascript, the autocomplete(autosuggestion) in the dynamically add?

sorry for bad english. so i want try make to dynamically add an new input field on key down with using ... >" anybody can help me?? See Question&Answers more detail:os...

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

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android - The response from the retrofit call is too slow and it returns a null list

Getting response as null in onResponse(). How to improve time duration for response? public class RequestClass { private ... (intent); } Thanks. 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# - How to enable button in WPF when task is done

I have a button, click it to start a task and disable the button, when the task is completed, I want to enable ... { //how to enable myButton } 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# - Is there some way to go on the previous page get the pressed button text?

I'm working on Visual Studio, in C# language I would like to ask if there's someway to go back to get the ... you need some code tell me. Thanks 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++ - What is the meaning of following syntax:: fstream myFile("test.txt", ios::in | ios::out | ios::trunc);

fstream myFile("test.txt", ios::in | ios::out | ios::trunc); How is this line interpreted by the compiler in C++ file handling? See Question&Answers more detail:os...

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

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jdbc - Writing to a new Blob in Java

I want to be able to create a new Blob object and then write to it. Originally, my general plan for this ... would be appreciated. Thanks! ~B See Question&Answers more detail:os...

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

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xml - Trying to add line breaks inside a template in XSLT

I have an XSLT file that is rendering an HTML page, I am trying to split the string by using ; as the delimiter ... best way to do this is). 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 get the log of Ping via PowerShell

I'm still new to PowerShell, May I ask about how to write the script to get the result from ping the IP ... I'm using Test-Connection command. See Question&Answers more detail:os...

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

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database - Jmeter Run SQL script from file

I am trying to run a couple SQL scripts in a Jmeter SetUp thread. Is it possible to run the SQL code ... connection and JDBC request. Thanks! See Question&Answers more detail:os...

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

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