Guard Clause

A Guard Clause is a Conditional placed at the top of a Routine (and sometime a Loop) which returns early in response to an Novel Scenario. Though it has the same Cyclomatic Complexity [[TODO]] as an if then, it's simpler to reason about and eliminates nesting.

function everyOtherValue(nums) {
	// Guard Clause
	if (nums == null) return null;
	var result = [];
	const nl = nums.length;
	for (var c = 0; c < nl; c++) {
		// Guard Clause, for loop edition
		if (c % 2 === 0) continue;

Guard Clauses are an example of Simplify Early. Guard Clauses are Clean.

#software #complexity