nand-logic-gates

logicGates

A logic gate library and simulator.

The goal a logic gate simulator that can be used for things like games.

How to use

//
// RS latch with NAND gates
//
// create a table of gates
var table = [
  [nand, 's,j', 'q']
  , [nand, 'r,q', 'j']
];

// set the starting state
var state = {
  s: 0
  , r: 1
};

// runTable will run until the state stabalizes (or it gives up.)
var result = engine.runTable(table, state);

assert(result.q, 1);
// check out /test for more examples

Each row is made up of three parts:

[gateFunction, inputs, outputs]

The inputs/outputs are variables inside the simulator. When you call runTable you pass in the intial state.

Inputs is a comma based list of properties on the state object.

var state = {s: 0, r: 1};

var inputs = 's';   // === state['s']
var inputs = 's,r'; // === [state['s'], state['r']]
// refrencing a property before it's defines will set it to 0
var inputs = 'j';   // === 0

Outputs is a comma based list of state properties to set to the result of the gate.

state['j'] = gateFunction.apply(null, inputs); // outputs === 'j'
state['j'] = state['q'] = gateFunction.apply(null, inputs); // outputs === 'j,q'