有没有更简单的方法可以在 JavaScript 中进行编码（while 循环和 switch 语句）？

Question

我想知道是否有另一种更简单的方法可以在 JavaScript 中获得此类代码的相同结果。我每次都使用 while 循环 来减少数字，但后来我不得不使用 switch 语句 来更改单词字符串中的“bottles”从复数到单数，因为瓶子的数量从 1 下降到 0。

var num = 99;
//The following code repeats the sentence with changing number gradually.
while (num>2) {
console.log(num + " bottles of juice on the wall! " + num + 
" bottles of juice! Take one down, pass it around..." + (num-1) 
+ " bottles of juice on the wall!" );
num = num - 1;

}

//then this code is for bottle to be singular as the number decrease to be 1 
then zero
switch (num){

case 2 :
console.log(num + " bottles of juice on the wall! " + num + 
" bottles of juice! Take one down, pass it around..." + (num-1) 
+ " bottle of juice on the wall!" );


case 1 :
console.log((num-1) + " bottles of juice on the wall! " + (num-1) + 
" bottles of juice! Take one down, pass it around..." + (num-2) 
+ " bottle of juice on the wall!" );

}

Answer 1

通常你会创建一个函数以复数或单数形式返回单词。

function bottles(num) {
  if( num === 1 ) {
    return '1 bottle';
  }
  
  return num + ' bottles';
}

for( var num = 99; num > 0; num-- ) {
  console.log(bottles(num) + " of juice on the wall! " + bottles(num) +
    " of juice! Take one down, pass it around... " + bottles(num - 1) +
    " of juice on the wall!");
}