Javascript truthy/falsey

Truthy.txt

// Outputs: "Truthy!"
logTruthiness(true);

// Outputs: "Truthy!"
logTruthiness({});

// Outputs: "Truthy!"
logTruthiness([]);

// Outputs: "Truthy!"
logTruthiness("some string");

// Outputs: "Truthy!"
logTruthiness(3.14);

// Outputs: "Truthy!"
logTruthiness(new Date());

// Outputs: "Falsy."
logTruthiness(false);

// Outputs: "Falsy."
logTruthiness(null);

// Outputs: "Falsy."
logTruthiness(undefined);

// Outputs: "Falsy."
logTruthiness(NaN);

// Outputs: "Falsy."
logTruthiness(0);

// Outputs: "Falsy."
logTruthiness("");