Populating an array of objects in javascript

Question

Let us say I have an object Airport with members airportCode and airportCity like this:

function Airport(airportCode, airportCity) {
        this.airportCode = airportCode;
        this.airportCity = airportCity;
    };

How can I create an array of objects Airport to which I can add. In Java, this would work like this:

while(st.hasMoreTokens()) {
    Airport a = new Airport();
    a.airportCode = st.nextToken();
    a.airportCity = st.nextToken();
    airports.add(a);
}

Create an array using var airports = [];. Then, in the loop, create an Airport instance, and add it to the array using the airports.push method. — Rob W
– Rob W, Commented Jul 17, 2012 at 21:12

user1073456 · Accepted Answer · 2012-07-18 11:43:56Z

11

A very short answer:

airports.push(new Airport("code","city"));

answered Jul 18, 2012 at 11:43

user1073456

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Comments

Chandu · Accepted Answer · 2012-07-17 21:13:44Z

7

Try this:

function Airport(airportCode, airportCity) {
        this.airportCode = airportCode;
        this.airportCity = airportCity;
};

var dataArray = [];

for(var i=0; i< 10; i++){
    dataArray[i] = new Airport("Code-" + i, "City" + i);
}

answered Jul 17, 2012 at 21:13

Chandu

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3 Comments

YMMD Over a year ago

Or simply dataArray.push(new Airport(...)); which is slightly faster. :-)

Esailija Over a year ago

here's another jsperf.com/push-vs-index-2 To show that it's much easier to write as well.

Chandu Over a year ago

I take back my previous comment since the results are not consistent across browsers/os.

Esailija · Accepted Answer · 2012-07-17 21:24:21Z

4

It's not really that different

var airports = [];
while (st.hasMoreTokens()) {
    var a = new Airport();
    a.airportCode = st.nextToken();
    a.airportCity = st.nextToken();
    airports.push(a);
}

answered Jul 17, 2012 at 21:24

Esailija

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