はてなブックマーク

Suppose I have a hyperlink in cell A1: =hyperlink("stackexchange.com", "Stack Exchange") Elsewhere in the sheet, I'd like to have formulas that get the link text and URL from A1, separately. I found a way to get just the link text: =""&A1 (concatenation with empty string). This returns "Stack Exchange", unlinked. How to get the URL (stackexchange.com)?

I've forwarded one of my really old email addresses to Gmail. I'd like to create a filter so that any mail to that old address is always labeled properly in Gmail. I can create a Gmail filter with the "To: " containing that address, but that doesn't catch all mails to that address, only the ones that are explicitly addressed. Often, there is spam where somebody else is the explicit recipient, and

I accidentally came across twitter.rs while googling. Is it the same as twitter.com? What is the purpose of it? What does .rs stand for?