Jquery 数组拼接也改变了之前声明的数组

Jquery array splice changes the previously declared array too

$(document).ready(function(){
    var $new_questions = [1,2,3,4,5];
    var $new_questions2 = $new_questions;
    
    $new_questions.splice(2, 2);
    
    $("#array_values_1").html($new_questions.toString());
    $("#array_values_2").html($new_questions2.toString());
});

我需要保留 $new_questions2 变量。但是当使用拼接时,两个数组都发生了变化。

https://jsfiddle.net/uoncyber/q51kjmny/5/

var $new_questions2 = $new_questions更改为var $new_questions2 = $new_questions.slice()