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pushdown in a sentence 9 out of 10 based on 5 ratings.

use pushdown in a sentence.

It's a pushdown stack of consolidated tabs.

Which is basically an artificial pushdown of car prices.

I always thought I was playing more like a pushdown automata than a Turing machine.

For finite-state and pushdown automata, derivatives and continuations are two sides of the same coin.

C macros are not Turing complete, they're a pushdown automaton.

You can only imperfectly emulate anything more than a regular language in a finite reality (since a pushdown automaton has an infinite stack).

I've seen the "pushdown" and find it's a great cue for taking a break from the computer.

The grammar itself is context-free and LL(k) and the implementation is trivial once you understand what pushdown automatons are (automata theory, right after finite-state machines).

Perl regular expressions probably accept more than just context-free grammars since the language that accepts prime numbers is not Context-Free, you can't build a pushdown automaton for such a language, there is a relatively trivial proof of this using the pumping lemma for context-free languages.

For those interested in symbolically manipulating [1] state machines (NFAs), pushdown automata (PDAs), and context-free grammars (CFGs), take a look at .

Interestingly, any physical, finite machine can be modelled as a finite state automaton (which is even more limited than a pushdown automaton) with a large enough state space.

The C preprocessor is a pushdown automaton, which if you add fixpoints (unbounded recursion) becomes a bounded storage machine.

I'm working on an open-source framework, and a series of command line tools built on top of the framework, for symbolically manipulating context-free grammars, non-deterministic pushdown automata, and non-deterministic finite automata.

Although there are some details about what kind of pushdown are supported by the FDWs (for example: to do a WHERE key=x, a non-toy Redis FDW should push the equality predicate to redis), it's no faster nor slower than calling a C function a bunch of times.

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