[codewars] Basic Mathematical Operations

https://www.codewars.com/kata/57356c55867b9b7a60000bd7

Description

Your task is to create a function that does four basic mathematical operations.

The function should take three arguments - operation(string/char), value1(number), value2(number).
The function should return result of numbers after applying the chosen operation.

Examples

(Operator, value1, value2) --> output

('+', 4, 7) --> 11
('-', 15, 18) --> -3
('*', 5, 5) --> 25
('/', 49, 7) --> 7

문제 해결

function basicOp(operation, value1, value2) {
    let answer = 0;
    switch (operation) {
        case '+':
            answer = value1 + value2;
            break;
        case '-':
            answer = value1 - value2;
            break;
        case '*':
            answer = value1 * value2;
            break;
        case '/':
            answer = value1 / value2;
            break;
    }
    return answer;
}

다른 풀이

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