有人能幫我把它轉(zhuǎn)換成js語(yǔ)法嗎？

var random = {
    int (min, max) {
      return Math.floor(Math.random() * (max - min) ) + min;
    },
    choices (options, weights) {
        // find the total weight. Can also be done by looping
        let totalWeight = weights.reduce((a, b) => a + b);
        // getting a random number from 0 till totalWeight
        let randomNumber = this.int(0, totalWeight);
        // resetting the totalWeight
        totalWeight = 0;
        for (let i in options) {
            totalWeight += weights[i];
            // once the weight hits the randomNumber, return the element
            if (totalWeight >= randomNumber) {
                return options[i];
            }
        }
        // otherwise, return the last element
        return options[options.length - 1][0];
    }
}
var options = [["1","1","1"],["39","39","39"],["10","10","10"],["19","19","19"],["1","1","1"],"2", "lose"];
var result = random.choices(options, [0.2,0.8,1,1,2,75,20])
console.log(result);