JS method to randomly retrieve several array elements from the array

How does JS randomly retrieve one or several elements from an array? In fact, the method is very simple. Below I will share with you the method of randomly extracting several array elements from JS, which is very good, for more information, see how JS randomly extracts one or several elements from an array.

If the array is

Var items = ['1', '2', '4', '5', '6', '7', '8', '9 ', '10'];

1. Randomly retrieve an element from the array items

Var item = items [Math. floor (Math. random () * items. length)];

2. Randomly retrieve several elements from the previous random array

Function getRandomArrayElements (arr, count) {var shuffled = arr. slice (0), I = arr. length, min = I-count, temp, index; while (I --> min) {index = Math. floor (I + 1) * Math. random (); temp = shuffled [index]; shuffled [index] = shuffled [I]; shuffled [I] = temp;} return shuffled. slice (min);} var items = ['1', '2', '4', '5', '6', '7', '8 ', '9', '10']; console. log (getRandomArrayElements (items, 4 ));

The above section describes how to randomly retrieve several array elements in JS. I hope it will be helpful to you. If you have any questions, please leave a message and I will reply to you in a timely manner. I would like to thank you for your support for PHP chinnet!

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