外文分享

问题 I'm writing my first real scraper and although in general it's been going well, I've hit a wall using Selenium. I can't get it to go to the next page. Below is the head of my code. The output below this is just printing out data in terminal for now and that's all working fine. It just stops scraping at the end of page 1 and shows me my terminal prompt. It never starts on page 2. I would be so grateful if anyone could make a suggestion. I've tried selecting the button at the bottom of the page

问题 I need to query fields and get all sub-collections and fields. Is it possible? Stream<List<ChatFieldModel>> getChatField(String uid) { var ref = _db.collection('chats') .where('toUserId', isEqualTo: uid); //Afterthat need to get sub collection with sub collection list of documents and main collection fields value. is it possible? return ref.snapshots().map((list) => list.documents .map((doc) => ChatFieldModel.fromForestore(doc)) .toList()); } 回答1: Firestore queries are shallow. They only

问题 I'm currently making an app implementing core data. However, when I build, it crashes at this line: Thread 1: Fatal error: Unresolved error Error Domain=NSCocoaErrorDomain Code=134140 "Persistent store migration failed, missing mapping model." UserInfo={sourceModel=() isEditable 0, entities { What does this mean? How can I solve this? ios swift Share 来源： https://stackoverflow.com/questions/57155241/xcode-crash-due-to-persistance-container-in-swift

问题 I am trying to receive/send data at the same time, and my idea to doing this was import multiprocessing import time from reprint import output import time import random def receiveThread(queue): while True: queue.put(random.randint(0, 50)) time.sleep(0.5) def sendThread(queue): while True: queue.put(input()) if __name__ == "__main__": send_queue = multiprocessing.Queue() receive_queue = multiprocessing.Queue() send_thread = multiprocessing.Process(target=sendThread, args=[send_queue],)

问题 I am solving one problem. I am trying to create a service for a program, but the .exe file has to be run in specific folder /File Properties - Start in/. Is there any way how to add ,,Start in,, to service? All services runs from C:\Windows\System32 .. and this one I want to run from C:\WinACD sc create WinACD binpath= "C:\WinACD\WTELS.EXE Z" start= auto I have to change working directory: C:\WinACD Thank you all, Robert 回答1: In the end I downloaded a program, which works perfectly for my

问题 How can I convert binary (base 2 stored as varchar) into decimal (base 10 stored as int or bigint) and the other way around, using T-SQL? Example results: 7 (dec) <--> 111 (bin) 136 (dec) <--> 10001000 (bin) 2123942362 (dec) <--> 1111110100110001100100111011010 (bin) 回答1: This answer can handle bigint Convert to bit(varchar containing 1 and 0) DECLARE @input BIGINT = 9223372036854775807 ;WITH N(N)AS ( SELECT top 63 POWER(cast(2 as bigint), ROW_NUMBER()over(ORDER BY (SELECT 1))-1) FROM (VALUES

问题 I'm wondering how I can count a particular objects in the text file using PowerShell. For example, this is the file I have: Color: Black Length: Long Size: 30 Color: Blue Length: Long Size: 20 Color: Black Length: Short Size: 10 How do I "Color" that is "Black" ? The output should be 2 according to the file. 回答1: You can read the text as single multiline string and break it down into blocks on the empty line. Then do a simple regex to catch the string you want and get the Count property of

问题 I'm trying to write a program that connects via SSH to a remote Linux server using Java. I've found a number of examples online to do this using the JSch package, but they're mostly for issuing a single command to the server right after authentication. Is there any way, however, to first authenticate with the SSH server, then, over the connection, issue commands from the user input like you would via a remote shell? 回答1: If you want to implement an interactive shell, you need to use SSH

问题 I am new to Azure and sharepoint integration with Java. I am trying to integrate Java with Sharepoint. The Sharepoint-Office 365 is available in Azure ADFS. I need to write a Java program to authenticate and then access the files using the RESTful APIs provided by Sharepoint. Azure is using WS-Federation authentication process. I have been trying to look for the code that helps me to use the WS-F authentication and then access the files. I am not able to find any useful material. The basic

问题 I have a webscraper setup to go through different dates and pull historical stats and save them to a DF. This has worked fine up until today when I tried updating my database. Here is the code: myDate = startDate while myDate < endDate: dateFormat = "{date.month:02}{date.day:02}{date.year}".format(date=myDate) url = "http://www.example.com/?date="+dateFormat driver.get(url) print(url) time.sleep(3) html = driver.page_source So I added the print command just to see what URL it was sending to