October 2024
Intermediate to advanced
272 pages
6h 54m
English
Content preview from Seven Obscure Languages in Seven WeeksBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Dissecting Flow Control
Flow control is about controlling the execution of the individual program statements (in our case, words). The “natural” flow control is sequential: the next statement in the program text is the next to be executed. Any other execution pattern requires some combination of unconditional jumps, conditional branches, and loops.
Theoretically, loops are not needed. Some languages don’t support loops directly. Assembly languages survive with jumps and branches. Erlang and Prolog implement looping behavior with tail recursion. Python list comprehensions and NumPy vectorized operations are also loops in disguise.
Forth has a set of predefined words to jump, branch, loop, go recursive, and handle exceptions (two more ways ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.