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311 views

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javascript - What is an unhandled promise rejection?

For learning Angular 2, I am trying their tutorial. I am getting an error like this: (node:4796) ... to check to get rid of this warning? Question&Answers:os...

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

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236 views

1 answer

Where does Android emulator store SQLite database?

I'm working on an Android application that stores data in a SQLite database. My question is, where does this database file ... so it can't just reside in RAM... Question&Answers:os...

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

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251 views

1 answer

Convert integer into byte array (Java)

what's a fast way to convert an Integer into a Byte Array? e.g. 0xAABBCCDD => {AA, BB, CC, DD} Question&Answers:os...

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

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349 views

1 answer

sql - SQLite INSERT - ON DUPLICATE KEY UPDATE (UPSERT)

MySQL has something like this: INSERT INTO visits (ip, hits) VALUES ('127.0.0.1', 1) ON DUPLICATE KEY UPDATE ... or UPDATE) or UPDATE (+ INSERT if UPDATE fails) Question&Answers:os...

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

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490 views

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c++ - Getting std :: ifstream to handle LF, CR, and CRLF?

Specifically I'm interested in istream& getline ( istream& is, string& str );. Is there an option to the ifstream constructor ... .erase( line.length()-1, 1); } Question&Answers:os...

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

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797 views

1 answer

c++ - Detecting TCP Client Disconnect

Let's say I'm running a simple server and have accept()ed a connection from a client. What is the best ... altogether? How can the server detect or handle this? Question&Answers:os...

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

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368 views

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oop - How can I access "static" class variables within methods in Python?

If I have the following code: class Foo(object): bar = 1 def bah(self): print(bar) f = Foo() f. ... can I access class/static variable bar within method bah? Question&Answers:os...

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

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1 answer

javascript - React-Router External link

Since I'm using react-router to handle my routes in a react app, I'm curious if there is a way to ... .com/hc/en-us/articles/123456789-Privacy-Policies" } Question&Answers:os...

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

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316 views

1 answer

javascript - Browser/HTML Force download of image from src="data:image/jpeg;base64..."

I am generating a image on client side and I display it with HTML like this: <img src="data:image/jpeg; ... Image and then start the download. Thanks a lot! Question&Answers:os...

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

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277 views

1 answer

unicode - Python string prints as [u'String']

This will surely be an easy one but it is really bugging me. I have a script that reads in a webpage and uses ... ascii or should I write a regex to strip it? Question&Answers:os...

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

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400 views

1 answer

java - Resource leak: 'in' is never closed

Why does Eclipse give me the warming "Resource leak: 'in' is never closed" in the following code? public void ... Rectangle: "); height = in.nextDouble(); Question&Answers:os...

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

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64 views

1 answer

Is it possible to cache POST methods in HTTP?

With very simple caching semantics: if the parameters are the same (and the URL is the same, of course), then it's a hit. Is that possible? Recommended? Question&Answers:os...

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

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674 views

1 answer

.net - Could not load file or assembly Microsoft.SqlServer.management.sdk.sfc version 11.0.0.0

I have installed MS SQL Server 2008 R2 and when I try to update model from database under EDMX file I am ... R2 Shared Management Objects from here but no joy. Question&Answers:os...

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

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194 views

1 answer

What is the use of static variable in C#? When to use it? Why can't I declare the static variable inside method?

I have searched about static variables in C#, but I am still not getting what its use is. Also, if I try to ... the instance of a class? Console.ReadKey(); } } Question&Answers:os...

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

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97 views

1 answer

android - Benefit of using Parcelable instead of serializing object

As I understand, Bundle and Parcelable belongs to the way Android performs serialization in. It is used for ... serialization and where better to use bundles? Question&Answers:os...

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

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287 views

1 answer

mysql - On Duplicate Key Update same as insert

I've searched around but didn't find if it's possible. I've this MySQL query: INSERT INTO table (id,a,b ... somebody can tell me what the most efficient way is. Question&Answers:os...

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

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940 views

1 answer

forms - Using the HTML5 "required" attribute for a group of checkboxes?

When using the newer browsers that support HTML5 (FireFox 4 for example); and a form field has the attribute ... ve made the "without Javascript" more obvious. Question&Answers:os...

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

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129 views

1 answer

c# - Is it possible to deserialize XML into List<T>?

Given the following XML: <?xml version="1.0"?> <user_list> <user> <id>1</id> <name>Joe</name> </user> ... [] ) would be acceptable, if a bit less preferable. Question&Answers:os...

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

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93 views

1 answer

c# - WPF Binding UI events to commands in ViewModel

I'm doing some refactoring of a simple application to follow MVVM and my question is how do I move a ... ; tagsList.ItemsSource = selectedLabelsView.Groups; } } Question&Answers:os...

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

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523 views

1 answer

PHP reading shell_exec live output

I'm just experimenting with PHP and shell_exec on my Linux server. It's a really cool function to use and I am ... or I'm not setting up the loop correctly. Question&Answers:os...

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

0 votes

974 views

1 answer

python - How do I handle the window close event in Tkinter?

How do I handle the window close event (user clicking the 'X' button) in a Python Tkinter program? Question&Answers:os...

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

0 votes

102 views

1 answer

javascript - Move the mouse pointer to a specific position?

I'm building a HTML5 game and I am trying to put the mouse cursor over a certain control on a specific event ... always has the same result. Is this possible? Question&Answers:os...

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

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698 views

1 answer

How can I bypass the Google CAPTCHA with Selenium and Python?

How can I bypass the Google CAPTCHA using Selenium and Python? When I try to scrape something, Google give me a ... : https://www.google.com/recaptcha/api2/demo Question&Answers:os...

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

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278 views

1 answer

ios - Unable to find specific subclass of NSManagedObject

I'm working on developing an app with Core Data. When I created an instance using: let entity = ... of the entity as in the following screenshot: Question&Answers:os...

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

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208 views

1 answer

JQuery: Remove duplicate elements?

Say I have a list of links with duplicate values as below: <a href="#">Book</a> <a href="#">Magazine< ... any duplicate values found and show 1 of each link. Question&Answers:os...

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

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197 views

1 answer

r - Repeat rows of a data.frame

This question already has answers here: Question&Answers:os...

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

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121 views

1 answer

ios - NSDictionary with ordered keys

I have an NSDictionary (stored in a plist) that I'm basically using as an associative array (strings as keys ... suggestions on how to more elegantly do this? Question&Answers:os...

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

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259 views

1 answer

c - Using malloc for allocation of multi-dimensional arrays with different row lengths

I have the following C code : int *a; size_t size = 2000*sizeof(int); a = (int *) malloc(size); which works fine ... *sizeof(char *); c = (char *) malloc(size); Question&Answers:os...

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

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