Javascript - 有条件地选择 while 循环的条件

Question

I need to fill an array with randomly selected elements until the array reaches an appointed length . The length of that array must be equal to the smallest of two lengths. We'll call them length_1 and length_2 . So if length_1 < length_2 , then use length_1 , otherwise, use length_2 . Note that both lengths are constant so the statement length_1 < length_2 will always give the same Boolean value.

The method I came up with to deal with that situation is to create a while loop which, at each turn, adds a new randomly selected element to the array. It goes like this:

while (
length_1 < length_2
  ? array.length < length_1
  : array.length < length_2
  ) {
    // Add a new randomly selected element to the array
     };

Is this a valid way to it? Is there a more concise way to go about it?

Answer 1

You could get the minimum in advance for a looping condition.

const
    length = Math.min(length_1, length_2);

while (array.length < length) {
    // ...
}

Answer 2

I try to avoid while loops. They are prone to get into an endless loop.

const length = Math.min(length_1, length_2);

for(let i = 0; i < length; i+=1) {
  //...
}