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Is there an Oracle NVL function equivalent in JavaScript/jQuery. I would be interested to see an example of how it works.
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NVL lets you replace null (returned as a blank) with a string in the results of a query. If expr1 is null, then NVL returns expr2 . If expr1 is not null, then NVL returns expr1 .
Introduction. When creating selector CASE statements, you cannot have NULL in the list of possible values. In PL/SQL the Boolean expression NULL=NULL evaluates to FALSE.
The NVL function lets you substitute a value when a null value is encountered. NVL replaces a null with a String. NVL returns the replacement String when the base expression is null, and the value of the base expression when it is not null.
The NVL( ) function is available in Oracle, and not in MySQL or SQL Server. This function is used to replace NULL value with another value. It is similar to the IFNULL Function in MySQL and the ISNULL Function in SQL Server.
In Javascript this can actually be handled by the || operator, that returns the first "valid" value.
var a = null;
var b = "valid value";
var c = a || b; // c == "valid value"
Just keep in mind that "falsy" values are not only null but also for example empty string '', number 0 and boolean value false. So you need to be sure that either you consider those with the same meaning as null or your variables cannot assume those values, because in those cases you will also get the second value selected:
var a = "";
var b = "valid value";
var c = a || b; // c == "valid value"
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