
What does this regular expression mean /^[a-z]{1}[a-z0-9_]{3,13}$/
2014年6月24日 · Assert position at the beginning of the string «^» Match a single character in the range between “a” and “z” «[a-z]{1}» Exactly 1 times «{1}» Match a single character present in …
bash - What does " 2>&1 " mean? - Stack Overflow
@dbr cmd 2>&1 >>file does not redirect stderr to the file, but cmd >> file 2>&1 does. Order matters. In the first case, stderr is redirected to the stdout of the shell (possibly a tty if the …
SQL Injection: or 1=1 vs - Stack Overflow
2020年3月30日 · That is a valid query and always evaluates to true because of the (OR 1=1), as a result the whole table values are returned. However, if the user input was: or 1=1;
What does [:-1] mean/do in python? - Stack Overflow
2013年3月20日 · >>> ''[:-1] '' This works on any sequence, not just strings. For lines in a text file, I’d actually use line.rstrip('\n') to only remove a newline ; sometimes the last line in the file …
NVM installation error on Windows. Cannot find the npm file
2025年1月8日 · I was using NVM to insall node js. But when i try to install this specific version nvm install 14.17.3 it is not able to detect the npm file. the .zip file for npm is not found in the …
huggingface hub - ImportError: cannot import name …
2025年1月21日 · 1. cannot import name 'AutoPipelineForText2Imag' from 'diffusers. 1. Cannot merge Lora weights back to the ...
Facebook share link - can you customize the message body text?
2011年2月17日 · Like @Ardee said you sharer.php uses data from the meta tags, the Dialog API accepts parameters. Facebook have removed the ability to use the message parameter but …
Using parameters in batch files at Windows command line
Batch Files automatically pass the text after the program so long as their are variables to assign them to. They are passed in order they are sent; e.g. %1 will be the first string sent after the …
visual studio - C++ cannot open source file - Stack Overflow
In Visual Studio, Right click on project and in Configuration Properties find C/C++ and then General/ In The window at the right side pick up a directory at Additional Include Directories row.
RegEx for matching "A-Z, a-z, 0-9, _" and "." - Stack Overflow
2019年5月14日 · ^[A-Za-z0-9_.]+$ From beginning until the end of the string, match one or more of these characters. Edit: Note that ^ and $ match the beginning and the end of a line.