Array.prototype.push.applyすげえ(;´Д`)

a = ["a","b","c"];
b = ["d","e","f"] 

Array.prototype.push.apply(a, b);

で
a = ["a","b","c","d","e","f"]になる
破壊的すぎる(;´Д`)てか[].push.applyとも書けるよな？
Javascriptは変態言語過ぎると思う