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TIL: Neanderthals knew how to create plied thread 40,000+ years ago! And not only that: s-twist singles z-twisted into triple-ply! Discovered from a cave in France, and dated to a time when only Neanderthals were known to be present.
https://www.iflscience.com/tiny-40000yearold-yarn-made-by-neanderthals-is-earliest-evidence-of-fiber-technology-55647
https://www.newscientist.com/article/2240117-oldest-ever-piece-of-string-was-made-by-neanderthals-50000-years-ago/
#TIL I could just "find . -type d -empty" to find empty directories. (Also works for empty (size 0) files)
#TIL Heute habe ich gelernt, dass die Verkehrsbetriebe in #Mainz einen "Null Euro Samstag" anbieten, bei dem man im Stadtgebiet kostenlos den #ÖPNV nutzen kann.
ℹ️ https://www.mainzer-mobilitaet.de/tickets-und-tarife/0-euro-samstag
#TIL that I was in need of an Emotional Support Viking
Today I learned: "zipper" actually used to be a brand name. The device is called a "clasp locker". https://www.consumerreports.org/consumerist/15-product-trademarks-that-have-become-victims-of-genericization/ #til #todayilearned #trivia
TIL the reason why old sports photos often have a blue haze is because the arenas were filled with people smoking cigarettes
https://petapixel.com/2015/10/15/why-old-sports-photos-often-have-a-blue-haze/
#til #todayilearned
https://www.reddit.com/r/todayilearned/comments/1ejcaxu/til_the_reason_why_old_sports_photos_often_have_a/
#TIL that bash's regex syntax gets confused sometimes, so it's best to do something like this:
~ $ size="1024 768"
~ $ [[ $size =~ ^[0-9]+ [0-9]+$ ]]
bash: syntax error in conditional expression
~ $ regex="^[0-9]+ [0-9]+$"
~ $ [[ $size =~ $regex ]]; echo $?
bash: syntax error near unexpected token `$size'
~ $ [[ $size =~ $regex ]]; echo $?
0
~ $
Umm... that second syntax error, I cannot account for.
@mirabilos, any idea what bash is smoking here???
#TIL that bash's regex syntax gets confused sometimes, so it's best to do something like this:
~ $ size="1024 768"
~ $ [[ $size =~ ^[0-9]+ [0-9]+$ ]]
bash: syntax error in conditional expression
~ $ regex="^[0-9]+ [0-9]+$"
~ $ [[ $size =~ $regex ]]; echo $?
bash: syntax error near unexpected token `$size'
~ $ [[ $size =~ $regex ]]; echo $?
0
~ $
Umm... that second syntax error, I cannot account for.
@mirabilos, any idea what bash is smoking here???
Hm, #TIL about the "most widespread security incident in the history of the Web", when in 1999 a security flaw in Hotmail was revealed that permitted anybody to log in to any Hotmail account using the password "eh".
TiL that nachos were invented by Ignacio Anaya. "Nacho" is the nickname of Ignacio.
https://en.wikipedia.org/wiki/Nachos#:~:text=Ignacio%20%22Nacho%22%20Anaya%20created%20nachos,eat%20at%20the%20Victory%20Club
#til #todayilearned
https://www.reddit.com/r/todayilearned/comments/1dh5px7/til_that_nachos_were_invented_by_ignacio_anaya/
