Random choices in a Javascript array

Question

Whoa, guys, I’m new to both stackoverflow and JS!

Next, I’m having trouble making a script that chooses a string within an array I wrote the code as follows:

let choices = ['a', 'b', 'c']
Math.floor(choices)

and returns not a number which is perfectly understandable, since the array values are strings, but as had said I’m new in the world of JS and I don’t know if the Math method is the best for the task, the same script in python would be much simpler:

import random

choices = ['a', 'b', 'c']
random.choice(choises)

I would like to know if you(a) would have any method suggestion in the JS that returns the value as in the code in Pythom. Thanks in advance!

Answer 1

Could implement as follows:

choices[Math.floor((Math.random() * choices.length))]

Answer 2

Well, the approach to your problem is pretty simple. In JS, I recommend generating a random number from 0 to the size of your array with the.length array, and then accessing a random Dice with that same generated number. Would look like this:

let choices = ['a', 'b', 'c']
let tamanho_array = choices.length
let n_aleatorio = Math.floor(Math.random() * tamanho_array);
let retorno_aleatorio = choices[n_aleatorio]

Thus, the random return variable will have its Random value.

Answer 3

You can use a function

let choices = ['a', 'b', 'c'];

function rand(choices) {
    console.log(choices[~~(choices.length * Math.random())]);
}
rand(choices);

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