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multithreading - Python time.sleep() vs event.wait()

I want to perform an action at a regular interval in my multi-threaded Python application. I have seen two ... full delay while shutting down) See Question&Answers more detail:os...

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

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Create random list of integers in Python

I'd like to create a random list of integers for testing purposes. The distribution of the numbers is not ... came, saw, and conquered. See Question&Answers more detail:os...

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

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r - Plot a function with ggplot, equivalent of curve()

Is there an equivalent method for plotting functions using ggplot to the curve() command employed in base graphics? ... bit more simple. 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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jquery - Page Redirect after X seconds wait using JavaScript

I need to redirect to specific url after 5 seconds after putting an error message. First i have used Javascript as ... to wait for 5 seconds. See Question&Answers more detail:os...

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

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macos - How to reinstall python@2 from Homebrew?

I have been having issues with openssl and python@2 with brew, which have explained here (unresolved). The ... arguments are required: command See Question&Answers more detail:os...

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

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list - How do I duplicate item when using jquery sortable?

I am using this method http://jqueryui.com/demos/sortable/#connect-lists to connect two lists that i have. ... like that. Any approaches? See Question&Answers more detail:os...

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

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r - Convert data frame with date column to timeseries

I've got a data frame with the following data: >PRICE DATE CLOSE 1 20070103 54.700 2 20070104 54.770 3 ... only for the ones i specify)? See Question&Answers more detail:os...

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

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typescript - How to deal with http status codes other than 200 in Angular 2

Right now the way I do http requests (borrowed from this answer) is this: POST(url, data) { var headers ... user experience (show errors, 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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r - data.table and parallel computing

Following this post: multicore and data.table in R, I was wondering if there was a way to use all cores ... allows such operations by design. See Question&Answers more detail:os...

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

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sql - Difference between Subquery and Correlated Subquery

Is the following piece of SQL Query a normal query or a Correlated Subquery ?? SELECT UserID, FirstName, ... the difference between the both See Question&Answers more detail:os...

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

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Remove whitespace in Python using string.whitespace

Python's string.whitespace is great: >>> string.whitespace ' x0bx0c ' How do I use this with a string without ... .whitespace[:-1] I suppose. 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 - Spring RequestMapping for controllers that produce and consume JSON

With multiple Spring controllers that consume and produce application/json, my code is littered with long annotations ... Content-Type headers. 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 do I do dependency parsing in NLTK?

Going through the NLTK book, it's not clear how to generate a dependency tree from a given sentence. The relevant ... pobj(in-5, sleep-7) 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 - VSCode Linter ES6 ES7 Babel linter

How to use Visual Studio code to lint JavaScript file based on babel/ES7 stage-0 rules? I only need to ... have webpack transpiling Js file. See Question&Answers more detail:os...

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

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When to use wildcards in Java Generics?

this is from HeadFirst Java: ( page 575 ) This: public <T extends Animal> void takeThing(ArrayList<T> ... declaration? What are the benefits? See Question&Answers more detail:os...

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

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.htaccess - Best Practice: 301 Redirect HTTP to HTTPS (Standard Domain)

I have been searching for the perfect 301 redirect. But I am finding so many solutions and do not know what's best. ... and from to HTTPS:// ? See Question&Answers more detail:os...

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

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Implementing yield (yield return) using Scala continuations

How might one implement C# yield return using Scala continuations? I'd like to be able to write Scala Iterators in ... around how to do 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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c - Writing to a closed, local TCP socket not failing

I seem to be having a problem with my sockets. Below, you will see some code which forks a server and a client. ... ); } } 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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Post on Facebook wall using Facebook Android SDK without opening dialog box

Using the Facebook SDK, I can login and store my access_token into a database. When I try to create a post ... without opening the dialog box? 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 do I get Pyflakes to ignore a statement?

A lot of our modules start with: try: import json except ImportError: from django.utils import simplejson as json ... ll just read the source.) See Question&Answers more detail:os...

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

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vertical & horizontal lines in matplotlib

I do not quite understand why I am unable to create horizontal and vertical lines at specified limits. I would like to ... color='k') plt.show() 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 android emulator for testing bluetooth application?

I am developing an application which will send a request to a bluetooth printer for printing. The code is ... emulator for bluetooth testing? 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 - Why is pow(a, d, n) so much faster than a**d % n?

I was trying to implement a Miller-Rabin primality test, and was puzzled why it was taking so long (> 20 ... when usually PyPy is much faster? 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++ - Where is shared_ptr?

I am so frustrated right now after several hours trying to find where shared_ptr is located. None of the ... Thanks for all the responses. 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# - Referenced Project gets "lost" at Compile Time

I have a C# solution with two projects: a service (the main project) and a logger. The service uses classes ... (obviously) that I'm missing? 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 map a nested value to a property using Jackson annotations?

Let's say I'm making a call to an API that responds with the following JSON for a product: { "id": 123, ... though I only need a single field. See Question&Answers more detail:os...

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

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SQL Server tables: what is the difference between @, # and ##?

In SQL Server, what is the difference between a @ table, a # table and a ## table? See Question&Answers more detail:os...

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

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django - Can I call a view from within another view?

One of my view needs to add an item, along with other functionality, but I already have another view ... # ... specific_add_item_view(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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