在javascript中將特定數組值（元音）更改爲大寫

Question

代碼有效，但我需要一種優化的方式，在javscript中，我可以得到一些關於此的建議！

//capitalize vowels in a string 

(function (string) { 
    var str = string.split(""); 
    console.log(str); 
    var name = []; 
    for (var i = 0; i < str.length; i++) { 
     //console.log(str[i]); 
     if (str[i] == "a") { 
      str[i] = "A"; 
     } 
     if (str[i] == "e") { 
      str[i] = "E"; 
     } 
     if (str[i] == "i") { 
      str[i] = "I"; 
     } 
     if (str[i] == "o") { 
      str[i] = "O"; 
     } 
     if (str[i] == "u") { 
      str[i] = "U"; 
     } 
    } 
    console.log(str); 
    return str; })("Hello Jane") 

Answer 1

什麼

var result = (function(string) { 
 
    return string.replace(/[aeiou]/g, function(char) { 
 
    return char.toUpperCase(); 
 
    }); 
 
})("Hello Jane") 
 

 
console.log(result)

---

沒有匿名函數

var string = "Hello Jane"; 
var result = string.replace(/[aeiou]/g, function (char) { 
    return char.toUpperCase(); 
}); 

console.log(result) 

演示：Fiddle

---

不使用正則表達式

var map = { 
 
    a: 'A', 
 
    e: 'E', 
 
    i: 'I', 
 
    o: 'O', 
 
    u: 'U' 
 
} 
 
var string = "Hello Jane"; 
 
var result = string.split('').map(function(char, i) { 
 
    return map[char] || char; 
 
}).join(''); 
 

 
console.log(result)