How can I add a key/value pair to a JavaScript object?

Question

Here is my object literal:

var obj = {key1: value1, key2: value2};

How can I add field key3 with value3 to the ob

Answer 1

Since its a question of the past but the problem of present. Would suggest one more solution: Just pass the key and values to the function and you will get a map object.

var map = {};
function addValueToMap(key, value) {
map[key] = map[key] || [];
map[key].push(value);
}