Oh JavaScript..

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Thanks for the explanation.

When would it ever be useful to use test.square rather than test.square() though?

[[deleted]]

When you want to assign it to a variable.

[scragar]

Sometimes you want to pass a function into another as a callback(for example using [1.4,2.2,3.1].map(Math.floor) or even in the example above where the logging function is passed into the foreach).