mathOperation.js (8kyu 02)

02 Apr 2018 in about Dev on Algorithm

Codewars 알고리즘 풀이

Description

Your task is to create a function that does four basic mathematical operations.
- 네 가지 기본 수학 연산을 수행하는 함수를 작성한다.

Solution 01

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

mathOperation('+', 4, 4);   // 8
mathOperation('-', 8, 2);   // 6
mathOperation('*', 2, 4);   // 8
mathOperation('/', 16, 2);  // 8

Solution 02

function mathOperation(operation, value1, value2) {
  switch (operation) {
    case '+': return value1 + value2;
    case '-': return value1 - value2;
    case '*': return value1 * value2;
    case '/': return value1 / value2;
  }
}

mathOperation('+', 4, 4);   // 8
mathOperation('-', 8, 2);   // 6
mathOperation('*', 2, 4);   // 8
mathOperation('/', 16, 2);  // 8

Solution 03

function mathOperation(operation, value1, value2) {
  let obj = {
    '+': value1 + value2,
    '-': value1 - value2,
    '*': value1 * value2,
    '/': value1 / value2
  };
  
  return obj[operation];
}

mathOperation('+', 4, 4);   // 8
mathOperation('-', 8, 2);   // 6
mathOperation('*', 2, 4);   // 8
mathOperation('/', 16, 2);  // 8

Solution 04

function mathOperation(operation, value1, value2) {
  return eval(value1 + operation + value2);
}

mathOperation('+', 4, 4);   // 8
mathOperation('-', 8, 2);   // 6
mathOperation('*', 2, 4);   // 8
mathOperation('/', 16, 2);  // 8