What is the reason behind the inability to add Symbol.iterator to an Object in this way?
Object.prototype[Symbol.iterator];
let obj = {num: 1 , type : ' :) '}
for (let p of obj) {
console.log(p);
}
// TypeError: obj is not iterable
In order to enable iteration over an object, you must set a generator function to
Object.prototype[Symbol.iterator]Object.prototype[Symbol.iterator] = function*() {
for (let key in this) {
yield this[key];
}
};
let exampleObj = {
number: 10,
message: 'Hello!'
}
for (let prop of exampleObj) {
console.log(prop);
}Not assigning anything to
Object.prototype[Symbol.iterator]Object.prototype[Symbol.iterator] = function*(){
for(let entry of Object.entries(this))
yield entry
};
let obj = {num: 1 , type : ' :) '}
for (let [k,v] of obj) {
console.log(k,v);
}
// another way
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