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firebase stopped responding and lost all data without any error or issue

I Lost All the data from My Firebase realtime database. This is working properly last day. Suddenly This stopped ... me try again dialog only See Question&Answers more detail:os...

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

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in R, leaflet don't reflect the latitude nor longitude?

in an attempt to create map like this one with my data frame and filters I found leaflet doesn't reflect ... the dataframe. thanks in advance See Question&Answers more detail:os...

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

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javascript - Canvas Draw Image issue on firefox, works well in chrome

I will assume this is some sort of compatibility issue. Everything works perfectly in chrome, but in firefox the ... elements are not drawn. See Question&Answers more detail:os...

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

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Asking for legitimate example of calling stored procedure C#: MYSQL

I've spent about 7 hours trying to figure this out by trial and error. All the online examples I have seen either don' ... ); } con.Close(); } } See Question&Answers more detail:os...

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

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javascript - How can I differentiate between an arrow function, class and a normal function?

How can I differentiate between these three things in ES6 using its reference? let x = i => i+1; class y ... in transpilers - Traceur / Babel? See Question&Answers more detail:os...

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

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c# - Drawing a Long String on to a Bitmap results in Drawing Issues

I'm working with drawing a long string to a bitmap (talking more than a million characters), including multiline ... with those 'extra' lines? See Question&Answers more detail:os...

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

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python - How to create 2d array with numpy random.choice for every rows?

I'm trying to create a 2d array (which is a six column and lots of rows) with numpy random choice with unique ... time: 557 ms Thank you all. See Question&Answers more detail:os...

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

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ios - Unexpected behavior when casting an NSNumber to Float

After upgrading to Xcode 9.3 (9E145) my App showed some unexpected behavior. It seems that the issue ... documentation that describes this? See Question&Answers more detail:os...

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mysql - How to run the PHP script at scheduled time

I need to run a php script at the scheduled time daily to update some fields in database and to send ... MySQL running in Linux Server. See Question&Answers more detail:os...

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String interpolation in Ruby doesn't work?

Recently I shifted to Ruby 2.0.0 from Ruby 1.9.3. In 1.9.3 we were used to perform string interpolation ... string interpolation in Ruby 2.0.0? See Question&Answers more detail:os...

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

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ios - How to handle iphone screen sizes/resolution for background images

After the iPhoneX, I am really struggling with the image sizes and naming conventions which supports all devices. ... imageview in full screen? See Question&Answers more detail:os...

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java - HK2 is not injecting the HttpServletRequest with jersey

I am trying to follow the example located here to create a factory in order to inject my HttpSession. Unfortunately no ... (HttpSession t) { } } See Question&Answers more detail:os...

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

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rust - How to end a borrow in a match or if let expression?

I am using a HashMap to store an enum. I'd like to get a value from the HashMap and if the value is a ... that I can get a new mutable borrow? See Question&Answers more detail:os...

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

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c# - Why is character being doubled in my @ string?

var phone = @"^+(?:[0-9] ?){6,14}[0-9]$"; phone will then equal ^\+(?:[0-9] ?){6,14}[0-9]$ ... it. Why is it doubling the and how do I stop it? See Question&Answers more detail:os...

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ios - Clear background for form sections in SwiftUI?

I'm trying to remove the white background of some sections so the elements lay right on the grey background, ... this be achieved in SwiftUI? See Question&Answers more detail:os...

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

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javascript - What is the benefit of prepending async to a function that returns a promise?

What is the benefit of prepending async here? async function asyncFunc () { return new Promise (function (resolve, reject) { }); } See Question&Answers more detail:os...

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

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undefined behavior - C - function returning a pointer to a local variable

Consider the following code. #include<stdio.h> int *abc(); // this function returns a pointer of type int ... everytime i run the program. See Question&Answers more detail:os...

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

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rust - Can I have a static borrowed reference to a trait object?

Is there a way for me to obtain a static borrowed reference to a struct's implementation of a trait: trait ... invoke f passing in instance2? } See Question&Answers more detail:os...

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

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javascript - Angular form validation ng-disabled not working

I am trying to use the angular form validations in my form for a blog post, and more specifically a ng-disabled form. ... ) { 'use strict' }); See Question&Answers more detail:os...

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ghci - Prefix form of unary operator in Haskell

In GHCi: Prelude> (+3) 2 5 Prelude> (*3) 2 6 Prelude> (/3) 2 0.6666666666666666 Prelude> (-3) 2 No ... the last one to make it return -1? See Question&Answers more detail:os...

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

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java - Get variable in other classes

I need to get variable inString in other class. How can I do this? public class main { public static ... Textcl.class, but get null. See Question&Answers more detail:os...

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

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javascript - Change matching words in a webpage's text to buttons

I am trying to make a Chrome extension that parses through a website looking for keywords, then replacing those ... Image of current results: See Question&Answers more detail:os...

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

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javascript - Appended new row is not behaving like previous one (row)

I have a HTML table in side which i have several td as input field,my table is dynamic, when page loads i am ... </table> </div> </div> See Question&Answers more detail:os...

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

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c# - GC.Collect() not collecting immediately?

In the course of a discussion in chat, I wrote this console application. Code: using System; class Program { static ... is, why doesn't it? See Question&Answers more detail:os...

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

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How to process JSON in PHP?

Here is the JSON which is sent asynchronously to my php page. It is essentially a product list, which ... help is really appreciated Taylor See Question&Answers more detail:os...

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

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c# - External Terminal / Debug outside the IDE

I'm starting to use Xamarin Studio, and migrating from VS to it, but when I try to run a console application ( ... read input, so it gets stuck. See Question&Answers more detail:os...

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

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c# - Best way to only perform a function if a (.NET) DLL is loaded?

I am not sure the best way to explain this so please leave comments if you do not understand. Basically, I ... practices for this sort of thing. See Question&Answers more detail:os...

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

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assembly - How to write an absolute target for a near direct relative call/jmp in MASM

To make a normal (near direct relative) call to an absolute address, in NASM or AT&T syntax you write call ... code I want to actually use. See Question&Answers more detail:os...

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

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