CODEWITHSUNDEEP
javascriptfunction
bib
bib

Reputation: 31

How can I create one large, overarching function given multiple smaller functions in Javascript?

I am building a computer simulation in which the user can create complex logic gates using building blocks like AND, OR, NOT and I would like the program to store the structure of the logic gate in a new function.

For example, XOR is a complex logic operation that looks like this in my function notation

AND( OR(x1, x2), NOT(AND(x1, x2)) )

where x1 and x2 are two boolean inputs. How can I generate a function like XOR(x1, x2) and be able to call it whenever I want. I don't want it hard coded in, I want to be able to generate it depending on what gates are being used and how they are connected.

Any ideas or thoughts or clarifying questions would be greatly appreciated!

xor returns true if one input is on but not if both are on. XOR logic gate

Upvotes: 0

Views: 146

Answers (2)

Carsten Massmann
Carsten Massmann

Reputation: 28196

Generally this is considered "unsafe", but it is certainly the most direct and intuitive answer: use eval():

const AND = (a,b) => a&&b;
const OR  = (a,b) => a||b;
const NOT = a => !a;

const a=true; b=false;

eval("XOR=(a,b)=>AND(OR(a,b),NOT(AND(a,b)))");

console.log(XOR(a,b));
console.log(XOR(a,a));
console.log(XOR(b,a));
console.log(XOR(b,b));

This can of course be embedded in a function that carries out some preprocessing and "safety checks" before actually applying the eval()-function on the user-supplied function-definition-string.

Upvotes: 1

Chris Happy
Chris Happy

Reputation: 7295

How about:

function XOR(var1, var2) {
  return var1 !== var2;
}

Where var1 and var2 are booleans.

Or

function XOR(var1, var2) {
  return AND( OR(var1, var2), NOT(AND(var1, var2)) );
}

Upvotes: 0

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