RGBz

def truncate = { attrs, body ->
        if (body().length() > attrs.maxlength.toInteger()) {
            out << """<abbr title="${body()}">${body()[0..attrs.maxlength.toInteger() - 1]}...</abbr>"""

        } else {
            out << body()
        }
    }

RGBz

const x = { y: 1 };

// Delete a key that doesn't exist from an optional chain
delete x?.y?.z;

// This results in:
// > {"y":1}
console.log(JSON.stringify(x));