katas/basicMathematicalOperations.js at master · 1Maria/katas · GitHub

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function basicOp(operation, value1, value2) {
    if (operation === '+') {
      return value1 + value2;
    } else if (operation === '-') {
      return value1 - value2;
    } else if (operation === '*') {
      return value1 * value2;
    } else {
      return value1 / value2;
    }
}

function basicOp(operation, value1, value2) {
    const operations = {
      '+': (a, b) => a + b,
      '-': (a, b) => a - b,
      '*': (a, b) => a * b,
      '/': (a, b) => a / b
    }

    return operations[operation](value1, value2);
}

function basicOp(operation, value1, value2) {
    return {
      '+': (a, b) => a + b,
      '-': (a, b) => a - b,
      '*': (a, b) => a * b,
      '/': (a, b) => a / b
    }[operation](value1, value2);
}

const basicOp = (operation, value1, value2) => (
    {
      '+': (a, b) => a + b,
      '-': (a, b) => a - b,
      '*': (a, b) => a * b,
      '/': (a, b) => a / b
    }[operation](value1, value2)
)

console.log((basicOp('+', 4, 7), 11));