一些JavaScript Quiz

var condition = true, numb = 0;
condition && alert('rain-man');
condition && (numb = 1 + 2);

var A = function(){
    this.name = 'rain-man';
};
A.prototype = {
    name : 'cnblogs'
};
var o = new A();
console.log(o.name);    // 'rain-man'

var B = function(){};
B.prototype = {
    name : 'obj-B'
};

var C = function(){};
C.prototype = new B();

var o = new C();
o.name = 'obj-c';
delete o.name;
console.log(o.name);    //'obj-B'，暴漏原型链