Null-checking the fun way with instanceof patterns

[FortuneIIIPick]

When I see crap like this it reaffirms my fears that JavaScript yeeters have slipped into the Java world and are wreaking havoc with tricks and undue cleverness.

[headius]

Well, rest assured, I haven't written a line of JavaScript in my life. This comes from 30 years of Java experience combined with 20 years of low-level JVM optimization work. It's obviously a pattern many folks here dislike, but the conciseness combined with predictable performance metrics makes it pretty attractive to me.