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javascript - What is the Proper Way to Destroy a Map Instance?

I recently developed an html5 mobile application. The application was a single page where navigation hash change ... destroy a map instance? 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 - Is there a synchronous alternative of setState() in Reactjs

According to the explaination in the docs: setState() does not immediately mutate this.state but creates a pending ... find the correct answer. 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 can I quickly estimate the distance between two (latitude, longitude) points?

I want to be able to get a estimate of the distance between two (latitude, longitude) points. I want to undershoot ... be at most 800 km apart. See Question&Answers more detail:os...

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

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ajax - Pure JavaScript code for HTTP Basic Authentication?

Where can I find reference code that implements a HTTP Basic Authentication client in pure JavaScript, suitable for ... , PHP frameworks, etc. 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 - What is print(f"...")

I am reading through a python script that takes an input of XML files and outputs an XML file. However, ... directory: {args.output_directory}") See Question&Answers more detail:os...

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

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uri - So what IS the right direction of the path's slash (/ or ) under Windows?

It seems Windows insists on writing a backslash in file paths, whereas .NET's URI class writes them with a slash ... with the rest of Windows? See Question&Answers more detail:os...

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

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css - z-index does not work in Internet Explorer with pdf in iframe

I cannot get z-index working on a iframe that contains a pdf file with IE8. It works with Google Chrome. Example ... :relative; z-index: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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c++ - openCV program compile error "libopencv_core.so.2.4: cannot open shared object file: No such file or directory" in ubuntu 12.04

I compiled and installed openCV 2.4.2 in ubuntu 12.04. Under /usr/local/include I can see the directories / ... file: No such file or directory 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 make an HTTP get request in C without libcurl?

I want to write a C program to generate a Get Request without using any external libraries. Is this possible using ... is there a better way ? 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++ - Problems with Singleton Pattern

I've been reading about Singleton pattern for last few days. The general perception is that the scenarios ... this testing concern? Thanks. 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 - What is the difference between a segmentation fault and a stack overflow?

For example when we call say, a recursive function, the successive calls are stored in the stack. However, due ... no answer to specific query). 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-FTP download all files in directory

I'm putting together a script to download all the files from a directory via FTP. So far I have ... improvements would be greatly appreciated. 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 can an iPhone access another non-iPhone device over wireless or Bluetooth?

I'm trying to figure out if an iPhone can connect to another non-iPhone device over wireless or Bluetooth and have ... 's not worth the effort. 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 limit the number of dropzone.js files uploaded?

Depending on the use case, how do I constrain the number of files that dropzone.js will allow? For example, ... of files handled per request. 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# - Unhandled exceptions in BackgroundWorker

My WinForms app uses a number of BackgroundWorker objects to retrieve information from a database. I'm using ... can interrogate for exceptions? See Question&Answers more detail:os...

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

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oop - When should I use static methods in a class and what are the benefits?

I have concept of static variables but what are the benefits of static methods in a class. I have worked on ... range for static method? Thanks See Question&Answers more detail:os...

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

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anaconda - How to set specific environment variables when activating conda environment?

Does anyone know how to automatically set environment variables when activating an env in conda? I have tried editing ... specific to each env. 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 - Filtering os.walk() dirs and files

I'm looking for a way to include/exclude files patterns and exclude directories from a os.walk() call. Here's ... better way to do this? How? See Question&Answers more detail:os...

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

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Listen outgoing SMS or sent box in Android

I am developing an application which will store all the incoming and outgoing sms in a text file in SD card. I am ... it. How can this be done? 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# - How do I access Configuration in any class in ASP.NET Core?

I have gone through configuration documentation on ASP.NET core. Documentation says you can access configuration from ... it in any class? See Question&Answers more detail:os...

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

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database - What's wrong with nullable columns in composite primary keys?

ORACLE does not permit NULL values in any of the columns that comprise a primary key. It appears that the ... more of a technical limitation? 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 - Is it possible to solve the "A generic array of T is created for a varargs parameter" compiler warning?

This is a simplified version of the code in question, one generic class uses another class with generic type ... cannot create generic arrays. See Question&Answers more detail:os...

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

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What does ?: do in Kotlin? (Elvis Operator)

I can't figure out what ?: does in for example this case val list = mutableList ?: mutableListOf() ... null) mutableList else mutableListOf() See Question&Answers more detail:os...

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

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314 views

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Android: Crop an Image after Taking it With Camera with a Fixed Aspect Ratio

I'm trying to crop an image after taking it, and my code is as follows: private void doTakePhotoAction() { Intent ... Thanks for the help! :) See Question&Answers more detail:os...

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

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Redirecting audio / creating alternate sound paths in Android

Does anyone have experience (using OpenSL ES, ALSA, etc.) with redirecting audio or creating new sound paths ... . Is this documented anywhere? See Question&Answers more detail:os...

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

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420 views

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python - Django 1.7 - makemigrations not detecting changes

As the title says, I can't seem to get migrations working. The app was originally under 1.6, so I understand ... one if that helps at 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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2.5k views

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angular - <img>: Unsafe value used in a resource URL context

Since upgrading to the latest Angular 2 release candidate, my img tags: <img class='photo-img' [hidden]="! ... still get the same error message See Question&Answers more detail:os...

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

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http - Proper REST response for empty table?

Let's say you want to get list of users by calling GET to api/users, but currently the table was truncated so ... for this scenario: 404 or 204? See Question&Answers more detail:os...

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

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