Optional parameters in Javascript | Mark Hansen

function connect(hostname, port, method) {
    if (hostname === undefined) hostname = "localhost";
    if (port === undefined) port = 80;
    if (method === undefined) method = "HTTP";
}

However, there’s a prettier shortcut:

function connect(hostname, port, method) {
    hostname = hostname || "localhost";
    port = port || 80;
    method = method || "GET";
}

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