currencyConversion

by codemeasandwich

JavaScript

const currencyRates = { USD:1.102539, EUR:1, GBP:0.84329691, AUD:1.61545337, CAD:1.44956315, CHF:1.07099756, JPY:120.4893208 }

 const currencyConversion = (from, to, val) =>  {
    // FYI: The results may differ for online currency Converters
    // because the exchange rate between BUYING and SELLING a currency is different
     return ~~(val / currencyRates[from] * currencyRates[to]);
  }
  
  function test(from, to, val, result){
  	const output = currencyConversion(from, to, val)
    return output === result ? ["✔",from, to] : ["✘",from, to,output,result]
  }
  
  console.log(test("USD","AUD",1000,1465))
  console.log(test("EUR","USD",1000,1102))  
  console.log(test("EUR","EUR",1000,1000)) 
  console.log(test("EUR","GBP",1000,0843))  
  console.log(test("EUR","AUD",1000,1615))
  console.log(test("USD","EUR",1000,907))  
  console.log(test("USD","USD",1000,1000))  
  console.log(test("JPY","USD",1000,9))
  console.log(test("GBP","EUR",1000,1185)) 
  console.log(test("AUD","EUR",1000,619))
  console.log(test("USD","GBP",1000,764))  
  console.log(test("GBP","AUD",1000,1915))
  console.log(test("AUD","USD",1000,682))
  console.log(test("AUD","JPY",1000,74579))
  /*
  console.log(currencyConversion("EUR","USD",1000),1102)  
  console.log(currencyConversion("EUR","EUR",1000),1000)  
  console.log(currencyConversion("EUR","GBP",1000),0843)  
  console.log(currencyConversion("EUR","AUD",1000),1615)
  
  console.log(currencyConversion("USD","EUR",1000),907)  
  console.log(currencyConversion("USD","USD",1000),1000)  
  console.log(currencyConversion("GBP","EUR",1000),1185)  
  console.log(currencyConversion("AUD","EUR",1000),619)
  
  console.log(currencyConversion("USD","GBP",1000),764)  
  console.log(currencyConversion("GBP","AUD",1000),1915)
  console.log(currencyConversion("AUD","USD",1000),682)  */