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A flip-flop is a device which stores a single bit (binary digit) of data; one of its two states represents a "one" and the other represents a "zero". Such data storage can be used for storage of state, and such a circuit is described as sequential logic in electronics.
All you need to do to figure out why we call them "flip-flops" is to walk around in a pair of them for just a little while. Because of how they're made, the rubber soles slap against the bottom of your feet as you walk, making a flip-flop, flip-flop sound.
Flip-flop is a circuit that maintains a state until directed by input to change the state. A basic flip-flop can be constructed using four-NAND or four-NOR gates. Types of flip-flops: RS Flip Flop. JK Flip Flop.
I have heard and read about flip-flops with regular expressions in Perl and Ruby recently, but I was unable to find how they really work and what the common use cases are.
Can anyone explain this in a language-agnostic manner?
Now that I understand what it is, and how it works, I would rephrase the question to be simply: What is a flip-flop operator?
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