Return string instead of null

Question

I'm using an API to get values to append to the DOM, out of the array a few of the values return null leaving them empty in the table. My question is it possible to return a string that states the "information is missing" instead of returning empty?

success: function(currency) {
    // loop through currency
    for (var i = 0; i < currency.length; i++) {
        if (currency[i].currency == userCurrency) {
            var $tr = $("<tr />");
            $tr.append($("<td />").text(currency[i].volume));
            $tr.append($("<td />").text(currency[i].latest_trade));
            $tr.append($("<td />").text(currency[i].bid));
            $tr.append($("<td />").text(currency[i].high));
            $("#theTable tbody").append($tr);
        }
    }
}
});
});
});

try .text(currency[i].bid || 'information is missing'));

Arun P Johny
– Arun P Johny

2016-01-05 08:55:45 +00:00
Commented Jan 5, 2016 at 8:55 — Arun P Johny
– Arun P Johny, Commented Jan 5, 2016 at 8:55

BenG · Accepted Answer · 2016-01-05 09:02:17Z

5

use || "information is missing" like so:-

$tr.append( $("<td />").text(currency[i].volume || "information is missing"));

This will then use "information is missing" for any false value, ie: 0, null, undefined, "", false.

Though if you only want to check for null, you could use an inline if:-

$tr.append( $("<td />").text(currency[i].volume != null ? currency[i].volume : "information is missing"));

edited Jan 5, 2016 at 9:02

answered Jan 5, 2016 at 8:56

BenG

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