JAVASCRIPT

map duplicate keys JS

// One can create a unique map. When there are two same keys, they can be stored as:

const map = {
    "Truck": [{ "Red": true }],
    "Compact Sedan": [{ "Black": false }, { "Blue": false }]
}

map["Compact Sedan"][0]; // { "Black": false }
map["Compact Sedan"][1]; // { "Blue": false }

how to create duplicate key array in javascript

var obj = {
  key1: []
};

obj.key1.push("something"); // useing the key directly
obj['key1'].push("something else"); // using the key reference

console.log(obj);

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