Wikipedia:Reference desk/Archives/Computing/2021 January 6

= January 6 =

Gmail unsubscribe feature
I've recently noticed (and really appreciated) that Gmail offers an "unsubscribe" feature beside many mass email senders' addresses. Is there now something structured into email protocols manages unsubscriptions, or is Gmail just detecting that the email somewhere contains an unsubscribe button and then pressing it for me? Hayttom (talk) 07:26, 6 January 2021 (UTC)
 * The sending system would have included a List-Unsubscribe: header in the e-mail and Gmail would have detected this. Including an unsubscribe mechanism is a legal requirement in many parts of the world. — GhostInTheMachine talk to me 09:33, 6 January 2021 (UTC)


 * What a perfect answer! Hayttom (talk) 10:50, 6 January 2021 (UTC)

How to execute this matrix codes from this video?
How to execute this basic matrix codes from this video? Rizosome (talk) 18:26, 6 January 2021 (UTC)


 * Do you mean, how does one express this in code in a programming language? That depends on the specific programming language and the available packages or libraries. --Lambiam 12:54, 7 January 2021 (UTC)


 * List of numerical libraries lists libraries, for a lot of languages, many of which implement matrix operations. -- Finlay McWalter··–·Talk 20:11, 7 January 2021 (UTC)