do questions on a platform similar to leetcode, youdao connectivity search. The function is placed in the class instead of using def _ _ init__ at the beginning of the class, an empty dictionary is declared directly but when you run the problem-...
for doubts about variable objects, please give us some advice. Thank you! problem description: The element of tuple tuple can only hold immutable objects, and the element in it can be list list , because what is actually stored is the address ...
PY built-in dictionary dynamic view is weak and can only be displayed in one way and cannot be updated in both directions. You can t press the key to take a value . is there a library with such a function two dictionaries share some key values with e...
I download and install nvm directly on the official website, not through homebrew then I want to set up a global package in node under nvm. npm config set prefix ~ .nvm npm-global I installed cnpm, globally first. I found the execution file in .ba...
when using Mini Program s modal component to achieve the mask layer effect, there will be the problem of scrolling through, that is, the page behind the mask layer can still scroll, is there a solution to this problem? ...
write the end text in a span and find that the font is offset downward relative to the space where the span is located. I only use the line-height setting to center the span relative to the parent, but the font inside is still offset downward relative t...
radial-gradient(100% 200% at 50% 0,transparent 0.65em, black 0.75em, black 47%,transparent 50%) 50% 64% 2.5em 1em; what does 50% 64% 2.5em 1em mean after this css code? ...
systemctl status transmission-daemon transmission-daemon.service - Transmission BitTorrent Daemon Loaded: loaded ( usr lib systemd system transmission-daemon.service; disabled; vendor preset: disabled) Active: active (running) since Wed 2018-12-...