erik’s weblog

It is not seldom that you see people messing with Object.prototype. This is very bad because it breaks the object-as-hash-tables feature in javascript. Basically, the following is a very common scenario:
var obj = {a: “A”, b: “B”, c: “C”, d: “D”};
for (var key in obj) {
doSomething(key, obj[key], obj);
}

if (”b” in obj) {
[...]