function Archiver() {
var archive = [2];
Object.defineProperty(this, 'archive', {
get: function() {
console.log('get!');
return archive;
},
set: function(value) {
console.log('set!');
}
});
}
var arc = new Archiver();
console.log(arc.archive);
console.log('-----以下不触发set(理解为指针未发生指向变动)----');
arc.archive[0] =9;
console.log('===以下触发set====');
arc.archive =[5,6];