Can you break down the process of 'tokens = exp.exec(a)' and '!!tokens[i + 1]'?

Thanks!

'Random r = new Random();'
Can anyone explain how does this work?

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Anyone can explain the formula?
Thank you

anyone can explain this code?
Thank you!

I see, thank you

function w(balls) {
var balls = [0,1,2,3,4,5,6,7];
}
Can you set the arg in the function?
Thanks!

How to break such complex code to read?
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Why you need to "return w([0,1,2,3,4,5,6,7]);" at the end?
Thank you!

"Array.prototype.slice.call(arguments)
.filter(n => n !== 0)
.reduce((p, c) => {
let q = [];
for (let i = 0; i < p.length; i++)
q.push(p[i].slice(0))
q.map(x => x.push(c));
return p.concat(q)
}, [[]])"
Hi, do you mind explain this part of your code. Thank you!

'1875 generates the largest palindrome number, namely 8?'
Anyone can hep me understand that?
Thanks!

'/\B.\B/g' only matches one character?

any notes?
'Magic.prototype.toString = function(){
return this.op().toString();
};'
What does this part for?
Thank you!

Why 'slice(0)'?

I can see that but I don't understand how your algorithm work?
你是套用了啥公式呀？

Can you explain the formula? How do you translate the compound interest? Thank you