You can discover beliefs that are shocking today, such as this excerpt from the article "Adolescence":
"In the case of girls, let them run, leap and climb with their brothers for the first twelve years or so of life. But as puberty approaches, with all the change, stress and strain dependent thereon, their lives should be appropriately modified. Rest should be enforced during the menstrual periods of these earlier years, and milder, more graduated exercise taken at other times. In the same way all mental strain should be diminished. Instead of pressure being put on a girl’s intellectual education at about this time, as is too often the case, the time devoted to school and books should be diminished. Education should be on broader, more fundamental lines, and much time should be passed in the open air."
Learn to play by ear. Practice scales. Practice arpeggios. Learn open chords. Learn barre chords. Learn moveable shapes. Learn to move among chord shapes. Practice with a metronome. Find people to play with. Learn to read music. Learn to sight read. Do all of these things and you will be a musician.
The AirPods Max are the most comfortable headphones I've ever worn. My head and my ears are both significantly larger than average and they are the only ones that don't squash my ears. I keep the Apple bra on it, inside a 3rd-party hard case, and it never runs down on its own. The battery is still healthy five years later. It's the last surviving Lightning connector in our household, and I might keep them for another five years.
The lack of agreement on how to spell chord symbols is a genuine problem. Brandt and Roemer's 1976 Standardized Chord Symbol Notation provides a reasonable standard, which was adopted by Sher Music in their "New Real" line of books, but it's not quite the same as the style chosen by the original Real Book authors that was mostly kept in the Hal Leonard editions. iRealPro uses a slightly different style. Chord chart readers have to be prepared for a variety of styles, unfortunately.
There are now six volumes of Real Books from Hal Leonard, plus a several others organized around genres or artists, plus the Sher Music books. A few thousand songs. Not every player has every book, but they are all available. Most songs are available for purchase for a few dollars each as downloadable PDFs.
If the band is flipping through their books, paper or electronic, to choose what tune to play next, that isn't a performance worthy of the term. It's a jam session. Which is fine, but hopefully nobody is paying to listen to it.
iReal Pro is a great resource, but what it provides are not lead sheets, they are just chord charts. Lead sheets have the melody of the song in standard notation, along with chord names and sometimes lyrics. iReal Pro's charts give chord names only.
First-class continuations remains the hardest nut to crack to implement any full specification of Scheme, especially if performance and/or compactness and/or simplicity of implementation and/or integration with other languages (C, C++, Java, etc.) is a priority. Scheme--, a subset with only downward continuations, i.e. continuations that could be implemented using only C setjmp and longjmp or equivalent, would still be an extremely useful language, but it is much harder to gather a community for such a project.
I was lucky enough to meet Alonzo Church and Haskell Curry at the ACM Symposium on LISP and Functional Programming at CMU in August 1982. Curry was clearly not well and only lived about two weeks after the conference, but Church was in good form and lived about 13 more years. Gerry Sussman was very excited while he went around the room at the reception introducing them, and of course it was a great thrill for us to meet them.
It's a shame to describe the tritone sub for G7 as C# F G# B, when the proper way to spell it is either Db F Ab Cb or C# E# G# B. Of course, then you'd have to explain about enharmonic equivalence and how chords are usually spelled with every other note.
"In the case of girls, let them run, leap and climb with their brothers for the first twelve years or so of life. But as puberty approaches, with all the change, stress and strain dependent thereon, their lives should be appropriately modified. Rest should be enforced during the menstrual periods of these earlier years, and milder, more graduated exercise taken at other times. In the same way all mental strain should be diminished. Instead of pressure being put on a girl’s intellectual education at about this time, as is too often the case, the time devoted to school and books should be diminished. Education should be on broader, more fundamental lines, and much time should be passed in the open air."