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For me, the indirection of pointers was one of the fundamental CS concepts that required real effort to understand.

Before that point, I had never clearly separated the concept of a variable and its value. It took a huge conceptual leap to think about a variable that didn't hold a value, but rather, the location of a value. It took some serious mental gymnastics to deal with pointers n-levels deep.

Mind you, this was actually Perl references, not pointers, so I didn't even have to try to comprehend doing math on them.

After a while, of course, it became second nature.

My favorite aspect of CS is that every so often, I run into a wall of conceptual understanding that requires completely changing how I think in order to move forward. Have you never had moments like this, or were they just different topics?




Actually learning about the stack was one of my big 'aha!' moments. I sorta' knew it existed, but I didn't really comprehend it.




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