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android - How to get Last record from Sqlite?

I have a one table question_table and one ImageButton (Back). I need to get the last inserted record from the ... ; Please give me some hint. 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 remove all rows in a numpy.ndarray that contain non-numeric values

Basically, I'm doing some data analysis. I read in a dataset as a numpy.ndarray and some of the values are ... do that with a numpy ndarray? See Question&Answers more detail:os...

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

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shell - Bash: Copy named files recursively, preserving folder structure

I was hoping: cp -R src/prog.js images/icon.jpg /tmp/package would yield a symmetrical structure in the ... to be no equivalent for cp. See Question&Answers more detail:os...

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

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node.js itself or nginx frontend for serving static files?

Is there any benchmark or comparison which is faster: place nginx in front of node and let it serve static ... manageable for me, any thoughts? 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 - How to run JUnit tests by category in Maven?

Using JUnit 4.8 and the new @Category annotations, is there a way to choose a subset of categories to run with ... a similar facility I can 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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c# - Use Task.Run() in synchronous method to avoid deadlock waiting on async method?

UPDATE The purpose of this question is to get a simple answer about Task.Run() and deadlocking. I very much ... Task>)MyAsyncMethod).Wait(); } See Question&Answers more detail:os...

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

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cocoa - Is there a "right" way to have NSTextFieldCell draw vertically centered text?

I have an NSTableView with several text columns. By default, the dataCell for these columns is an ... dataCell] setVerticalCentering:YES]; 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 - multiprocessing.Pool() slower than just using ordinary functions

(This question is about how to make multiprocessing.Pool() run code faster. I finally solved it, and the final ... while True: print q.get() See Question&Answers more detail:os...

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

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Android Alert Dialog with one, two, and three buttons

I don't make alerts very often but every time I do it takes me a while to read through the documentation and ... to do it for one button. See Question&Answers more detail:os...

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

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ORM for DELPHI win32

Does anyone know about an ORM or something similar for Delphi Win32. See Question&Answers more detail:os...

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

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memory - iPhone - dealloc - Release vs. nil

Wondering if someone with experience could possibly explain this a bit more. I have seen examples of... [view release] ... drops it from 3 to 2. 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++ - Thread pool using boost asio

I am trying to create a limited thread pool class using boost::asio. But I am stuck at one point can some one ... back to stack? return 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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php - How to display string that contains HTML in twig template?

How can I display a string that contains HTML tags in twig template? My PHP variable contains this html and ... possible to get this easily? 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 - CSS3 Flexbox: display: box vs. flexbox vs. flex

Yesterday I got a website in the school which uses the CSS 3 flexbox statement. I never used that before. ... differences? Which I should 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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ruby on rails - An error occurred while installing pg (0.17.1), and Bundler cannot continue

I just installed Rails 4.0.2 and when creating a new app, in the bundle stage I get: Installing pg (0.17. ... options. How do I fix this? See Question&Answers more detail:os...

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

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Why can't Java constructors be synchronized?

According to the Java Language Specification, constructors cannot be marked synchronized because other threads cannot see ... know the 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 Multiprocessing.Pool lazy iteration

I'm wondering about the way that python's Multiprocessing.Pool class works with map, imap, and map_async. My ... as needed? Thanks, Gabe 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 - Android App Bundle introduces Resource Not found crash in Android app

By using Android's new Android App Bundle, I have received a Resource Not Found error in 2 of my ... adding SwitchCompat in Android App Bundle 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# - EF Data Context - Async/Await & Multithreading

I frequently use async/await to ensure ASP.NET MVC Web API threads are not blocked by longer-running I ... execute synchronous then instead? 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 use Python decorators to check function arguments?

I would like to define some generic decorators to check arguments before calling some functions. Something like: ... type hinting and mypy. See Question&Answers more detail:os...

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

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android - Can you launch the native Camera App from an Html 5 Web App?

I have a mobile website that allows users to upload photos using the file input type (Browse button). If ... on Phone Number and Addresses. 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 do i use subprocesses to force python to release memory?

I was reading up on Python Memory Management and would like to reduce the memory footprint of my application. ... python c-extensions as well? See Question&Answers more detail:os...

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

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Internet Explorer 9, 10 & 11 Event constructor doesn't work

I am creating an event, so use the DOM Event constructor: new Event('change'); This works fine in modern ... there a workaround I can 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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drop down menu - Firefox ignores option selected="selected"

If you change a dropdown and refresh the page, Firefox seems to ignore the selected attribute. <option selected=" ... when the page loads)? See Question&Answers more detail:os...

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

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Visual Studio - Where to define custom path macros?

I just opened someone else's Visual Studio project and in their build properties they have a few custom path ... these custom path macros at? See Question&Answers more detail:os...

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

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iPhone UIWebView local resources using Javascript and handling onorientationChange

I'm trying to server HTML Javascript and CSS content from an iPhone application's local resources, and I'm having ... div> </body> </html> See Question&Answers more detail:os...

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

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flutter - Vertical viewport was given unbounded height

This is my code: @override Widget build(BuildContext context) { return new Material( color: Colors.deepPurpleAccent, ... /object.dart:1555:9) 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 - Check if one list contains element from the other

I have two lists with different objects in them. List<Object1> list1; List<Object2> list2; I want to check ... Can someone propose it? 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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