HomeAboutMeBlogGuest
© 2025 Sejin Cha. All rights reserved.
Built with Next.js, deployed on Vercel
📌
hkob's Notion/
ℹ️
逆引きFormula 2.0/
📓
substring/
0, 4

0, 4

func_without_end
func_with_end
method_with_end
start
0
str
ABCDE
end
4
method_without_end