Why are the terminal command parameters of mac basically two "-"?

such as svnserve-- version

Swift objective-c python java
Mar.10,2021

single "-" there are also many
svnserve help documentation

< hr >

by the way, you can learn about the acquisition and implementation of long and short parameters in the program
link

Previous: Element UI cascade selector

Next: Mongodb data structure of some questions boss please come in!

css mysql arrays josn react html typescript webpack npm sass R objective-c .net sql-server jquery python-3.x angularjs django angular excel regex iphone ajax linux xml pandas vba spring database wordpress string wpf xcode windows bash postgresql oracle multithreading eclipse list firebase algorithm macos forms image scala visual-studio azure bootstrap spring-boot react-native python-2.7 docker performance function winforms matlab powershell apache dataframe api sqlite numpy rest shell selenium flutter dart maven loops qt swing android-studio csv express file class tensorflow sorting codeigniter perl
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1bdf67a-31460.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1bdf67a-31460.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?