For me it’s time signatures in music. I grew up playing instruments, played in several orchestras, etc. But no matter how many times someone tries to explain time signatures to me, it makes no sense. I don’t understand why people place such importance on it. To me, notes have a pitch and a duration, maybe some dynamics. That’s it. I don’t understand why people try to needlessly complicate it. It doesn’t give you anything.
My wife will hear a song and go “Oh neat, it’s in 5/8.” And I’m like “How tf do you know that, and why does it matter?”
About Casting, at least in the granddaddy of programming languages, C, just meant interpreting the value of a variable as if it was a different kind of variable. Important detail is that variables are actually just memory locations and the number of bytes that conform it. So if you have a variable x of type string that holds the letter A, and a variable y also of type string with the letter B, if you do
x+y
You get ‘AB’. But if you cast the variables like this:
(int)x + (int)y
You get 131
To put it in words as you asked, you are saying “please add the values located at memory locations x and y, but treat the values found there as if they were numbers, and not the ASCII codes for letters (which is what I had originally told you was there)”.
It’s been almost 30 years since the last time I actually used this, so I might be recalling something wrong.