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csv - What is the opposite of GROUP_CONCAT in MySQL?

I seem to come against this problem a lot, where I have data that's formatted like this: +----+------- ... do this? What is this kind of operation even called? Question&Answers:os...

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

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macos - Working with an Access database in Python on non-Windows platform (Linux or Mac)

I want to access the data in a Microsoft Access database. I have some .accdb and .mdb files and want to ... . Any help or starting would be highly appreciated. Question&Answers:os...

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

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Can Firebase hosting restrict access to resources?

Is it possible to restrict access to a resource (i.e. index.html) depending on whether the user is logged in or not? Maybe something like .htaccess? Question&Answers:os...

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

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Java String replace not working

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

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x86 - 8086 assembly on DOSBox: Bug with idiv instruction?

I was helping a friend of mine debug his program, and we narrowed it down to an issue which occurs ... infinitum. Does anyone have any explanation for this? Question&Answers:os...

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

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function - What is the difference between a 'closure' and a 'lambda'?

Could someone explain? I understand the basic concepts behind them but I often see them used interchangeably and I ... do they differ from a regular function? Question&Answers:os...

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

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JavaScript chop/slice/trim off last character in string

I have a string, 12345.00, and I would like it to return 12345.0. I have looked at trim, but it looks like ... I don't see how this would work. Any suggestions? Question&Answers:os...

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

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language agnostic - What are sessions? How do they work?

I am just beginning to start learning web application development, using python. I am coming across the terms ' ... am getting quite confused here. Need help. Question&Answers:os...

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

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Propagate all arguments in a bash shell script

I am writing a very simple script that calls another script, and I need to propagate the parameters ... do this without explicitly specifying each parameter? Question&Answers:os...

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

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What is the { get; set; } syntax in C#?

I am learning ASP.NET MVC and I can read English documents, but I don't really understand what is happening in this ... What does this mean: { get; set; }? Question&Answers:os...

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

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What is the correct way to check for string equality in JavaScript?

What is the correct way to check for equality between Strings in JavaScript? Question&Answers:os...

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

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html - Open link in new tab or window

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

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What are all the different ways to create an object in Java?

Had a conversation with a coworker the other day about this. There's the obvious using a constructor, but what are the other ways there? Question&Answers:os...

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

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javascript - Accessing Redux state in an action creator?

Say I have the following: export const SOME_ACTION = 'SOME_ACTION'; export function someAction() { return { ... ; dispatch(anotherAction(items)); } } Question&Answers:os...

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

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multi-step registration process issues in asp.net mvc (split viewmodels, single model)

I have a multi-step registration process, backed by a single object in domain layer, which have ... without props that come from converted Step2ViewModel. Question&Answers:os...

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

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linux - How to make a program continue to run after log out from ssh?

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

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html - Center image horizontally within a div

This is probably a stupid question but since the usual ways of center aligning an image are not working I thought I would ... <div id="genre">Punk</div> </div> Question&Answers:os...

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

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html - Clear form fields with jQuery

I want to clear all input and textarea fields in a form. It works like the following when using an input ... just the form the actual reset button lives in? Question&Answers:os...

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

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578 views

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undo - How do I "un-revert" a reverted Git commit?

Given a change that has been committed using commit, and then reverted using revert, what is the best way to then ... commit, so as to not re-write history. Question&Answers:os...

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

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c++ - What really is a deque in STL?

I was looking at STL containers and trying to figure what they really are (i.e. the data structure used), and the ... needs to be moved to a new bigger place. Question&Answers:os...

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

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186 views

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Simulation of CONNECT BY PRIOR of Oracle in SQL Server

How can I get the functionality of CONNECT BY PRIOR of Oracle in SQL Server 2000/2005/2008? Question&Answers:os...

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

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c++ - What is the lifetime of the result of std::string::c_str()?

In one of my programs, I have to interface with some legacy code that works with const char*. Lets say I have ... of c_str() to another place ? Thank you. Question&Answers:os...

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

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1 answer

Adding days to a date in Java

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

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136 views

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android - Error:Execution failed for task ':app:transformClassesWithJarMergingForDebug'

Good day. After updating google repository in AndroidStudio, I have an issue > Error:Execution failed for task ':app: ... .gms:play-services-gcm:8.1.0' } Question&Answers:os...

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

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296 views

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Python list multiplication: [[...]]*3 makes 3 lists which mirror each other when modified

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

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r - Categorize numeric variable into group/ bins/ breaks

I am trying to categorize a numeric variable (age) into groups defined by intervals so it will not be continuous. I ... is? data is the dataframe I am using. Question&Answers: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 print original variable's name in Python after it was returned from a function?

I have enum and use the variables like myEnum.SomeNameA, myEnum.SomeNameB, etc. When I return one of these ... .SomeNameA) instead of the value they returned? Question&Answers:os...

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

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366 views

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Convert Python sequence to NumPy array, filling missing values

The implicit conversion of a Python sequence of variable-length lists into a NumPy array cause the array to be of type object. ... 1, 0], [1, 2]], dtype=int32) Question&Answers:os...

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

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