CODEWITHSUNDEEP
javascript
Shyam Hajare
Shyam Hajare

Reputation: 171

perform calculation according to formula and object as parameter

I have created getResult function to perform calculation according to formula. is there any way to perform this calculations please let me know if you have any solution.

Thanks in Advance 

let formula = "a*b";
let parameters = {a:3,b:4}
let getResult = function(formula, parameters){ 

}

Upvotes: 0

Views: 41

Answers (2)

Andy
Andy

Reputation: 63550

A simple calculator that doesn't rely on eval:

let formula = "a*b";
let parameters = {a:3,b:4}

function getResult(formula, parameters){ 
  const operator  = formula.match(/[+-\/*]{1}/)[0];
  const {a, b} = parameters;
  switch(operator) {
    case '+': return a + b;
    case '-': return a - b;
    case '*': return a * b;
    case '/': return a / b;
  }
}

const result = getResult(formula, parameters);
console.log(result);

Upvotes: 1

Nitish Narang
Nitish Narang

Reputation: 4184

Try this. Though "eval" is something to be avoided.

let formula = "a*b";
let parameters = {a:3,b:4}
let getResult = function(formula, parameters){ 
  let cal = [...formula].map(d => parameters[d] || d).join('')

  return eval(cal)
}

console.log(getResult(formula, parameters))

Upvotes: 0

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