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When I use static variables in C++, I often end up wanting to initialize one variable passing another to its constructor ... ll have to learn to live with it... Question&Answers:os...

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

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Android - SMS Broadcast receiver

I have been trying to get this program to work but so far having no luck. I cannot find where I am doing wrong ... ! So I'm wondering if something's wrong here. Question&Answers:os...

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

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mysql - Join between tables in two different databases?

In MySQL, I have two different databases -- let's call them A and B. Is it possible to perform a join between ... database A, to a table that is in database B? Question&Answers:os...

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

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android - How to send string from one activity to another?

I have a string in activity2 String message = String.format( "Current Location Longitude: %1$s Latitude: %2$s", lat, ... field in activity1. How can I do that? Question&Answers:os...

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

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python - Get a variable from the URL in a Flask route

I have a number of URLs that start with landingpage and end with a unique id. I need to be ... http://localhost/landingpageB http://localhost/landingpageC Question&Answers:os...

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

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excel - Copy Paste Values only( xlPasteValues )

I'm trying to copy entire column in sheetA to Sheet B. sheetA column has values formed with formuls. I ... End With Next Application.CutCopyMode = False End Sub Question&Answers:os...

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

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r - Can lists be created that name themselves based on input object names?

It would be very helpful to me to be able to create an R list object without having to specify the names of ... 18 19 20 This would be ideal. Any suggestions? Question&Answers:os...

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

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javascript - Array.fill(Array) creates copies by references not by value

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

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NoSuchElementException with Java.Util.Scanner

I am very new to Java but am working through the book Java: How to program (9th ed.) and have reached an ... than this in terms of deducing what the problem is. Question&Answers:os...

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

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scheme - My code signals the error "application: not a procedure" or "call to non procedure"

During the execution of my code I get the following errors in the different Scheme implementations: Racket: application: ... non procedure application: (1 2 3) Question&Answers:os...

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

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asp.net mvc - Why does the DropDownListFor lose the multiple selection after Submit but the ListBoxFor doesn't?

I have read many articles about using MultiSelectList and have yet to understand what is going wrong with my DropDownListFor ... multiple = "multiple" }) </div> Question&Answers:os...

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

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flutter - How to wait for forEach to complete with asynchronous callbacks?

sample code Map<String,String> gg={'gg':'abc','kk':'kojk'}; Future<void> secondAsync() async { ... print third expected Output Second! Third! Third! third Question&Answers:os...

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networking - What is the difference between a port and a socket?

This was a question raised by one of the software engineers in my organisation. I'm interested in the broadest definition. Question&Answers:os...

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

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sql server - How do I get list of all tables in a database using TSQL?

What is the best way to get the names of all of the tables in a specific database on SQL Server? Question&Answers:os...

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

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javascript - Show or hide element in React

I am messing around with React.js for the first time and cannot find a way to show or hide something on ... React.renderComponent(<Search /> , document.body); Question&Answers:os...

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

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sql - Paging with Oracle

I am not as familiar with Oracle as I would like to be. I have some 250k records, and I want to display ... to integrate in very well with my new stored procs. Question&Answers:os...

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

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python - Method Resolution Order (MRO) in new-style classes?

In the book Python in a Nutshell (2nd Edition) there is an example which uses old style classes to ... Please help me in better understanding of MRO. Question&Answers:os...

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

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Plot logarithmic axes with matplotlib in python

I want to plot a graph with one logarithmic axis using matplotlib. I've been reading the docs, but can't figure out the ... (a, color='blue', lw=2) pylab.show() Question&Answers:os...

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

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What is fastest children() or find() in jQuery?

To select a child node in jQuery one can use children() but also find(). For example: $(this).children('. ... Now, which option is fastest or preferred and why? Question&Answers:os...

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

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c# - Can I load a .NET assembly at runtime and instantiate a type knowing only the name?

Is it possible to instantiate an object at runtime if I only have the DLL name and the class name, without adding ... root, system32, or even loaded in the GAC. Question&Answers:os...

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

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Java code To convert byte to Hexadecimal

I have an array of bytes. I want each byte String of that array to be converted to its corresponding ... Java to convert a byte array to Hexadecimal ? Question&Answers:os...

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

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Android create shortcuts on the home screen

What I want to do is: 1) I'm inside an activity, there are 2 buttons. If I click the first one a shortcut is ... code trustable or not.....help me pls..... Question&Answers:os...

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

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android - What is Activity.finish() method doing exactly?

I'm developing android applications for a while, and followed a lot of posts about activity life cycle, and application' ... () and onDestroy() won't be called? Question&Answers:os...

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

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.net - Is floating-point math consistent in C#? Can it be?

No, this is not another "Why is (1/3.0)*3 != 1" question. I've been reading about ... libraries that would help keep floating-point calculations consistent? Question&Answers:os...

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

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java - Comparator.reversed() does not compile using lambda

I have a list with some User objects and i'm trying to sort the list, but only works using method reference, ... () location: variable u of type Object 1 error Question&Answers:os...

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

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sql - mysql Foreign key constraint is incorrectly formed error

I have two tables, table1 is the parent table with a column ID and table2 with a column IDFromTable1 (not the ... other information is needed. I am new to mysql Question&Answers:os...

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

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c# - Calling stored procedure with return value

I am trying to call a stored procedure from my C# windows application. The stored procedure is running on a ... more information is needed, please let me know. Question&Answers:os...

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

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MySQL integer field is returned as string in PHP

I have a table field in a MySQL database: userid INT(11) So I am calling it to my page with this query: " ... I get a string. Shouldn't this be an integer? Question&Answers:os...

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

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