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System.ArgumentException: Xamarin.Forms

I am new to this awesome platform, I made very simple example it contains only one xaml page yesterday it worked flawlesly , but when ran it today , it threw this exception out of nowhere this the exception am getting : HelloPage.xaml : <?xml version="1.0" encoding="utf-8" ?> <ContentP . . .阅读更多

Generate the shortest alphanumeric save code

For the purpose of a game, I need to generate a save code that the user can note somewhere and use to reload his game state later (no persistent data possible). The save code needs to be short like 6DZF1D3, (a base 36 or base 62 string). I'm storing scores of levels in a Dictionary<int . . .阅读更多

TypeError with ufunc bitwise_xor

In my program which traces out the path of a particle, I get the following error: Traceback (most recent call last): File "C:\Users\Felix\Google Drive\Research\", line 154, in <module> bfield += b_X(r_p(r,pos[2]))*(r_p(r,pos[2])/r) *((r-r_p(r,pos[2]))**2+pos[2]* . . .阅读更多

Python selenium: DevTools listening on ws://

Today I got this message on the console when running selenium using the chromedriver. How do I suppress this? DevTools listening on ws:// Relevant code: from selenium import webdriver driver = webdriver.Chrome(execut . . .阅读更多