Comments on: Concisely operating with ternaries

By: Andy

Andy — Mon, 19 May 2008 14:40:57 +0000

Ted- thanks for the example of the Elvis operator– indeed, quite Groovy, man. If writing ternary style logic in Groovy, it’s a total win!

By: Grundlefleck

Grundlefleck — Mon, 19 May 2008 10:17:55 +0000

Yes, I’m a moron who skim reads. Ignore.

By: Grundlefleck

Grundlefleck — Mon, 19 May 2008 10:11:00 +0000

Sorry to burst your bubble, but Java has this operator too. Not sure how long though.
[code]

public class TernaryDemo{
public static void main(String[] args){
String location = null;

String ternaryLocation = location == null? “DefaultLocation”: location;

System.out.println(”Ternary selected location is: ” + ternaryLocation);
}
}

[/code]

java TernaryDemo
Ternary selected location is: DefaultLocation

~ Grundlefleck

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Pages tagged "laconic" — Sat, 17 May 2008 22:00:21 +0000

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By: Ted Naleid

Ted Naleid — Sat, 17 May 2008 18:13:37 +0000

Don’t forget about the “?:” Elvis operator (does it get any groovier than Elvis?). It’s essentially a shortened form of the ternary operator where if the first value evaluates to false, the expression will evaluate to the item after the operator.

So in the example you gave above, it can be reduced even further to:

this.location = location ?: DEFAULT_LOC_NAME

If “location” is null, this.location will be set to DEFAULT_LOC_NAME, otherwise, if location is not null this.location will be set to location’s value.