TryCF Gist

trycf-gist-1673599142267-11149466-1305-c650-25ce-b287f980059b.cfm

<cfscript>
function run() {
    describe("test of array flattening functions", () => {
        var testCases = [
            "empty array" = {
                input = [],
                expected = []
            },
            "simple array" = {
                input = ["a", "b","c", "d"],
                expected = ["a", "b", "c", "d"]
            },
            "with embedded array" = {
                input = ["a", ["b","c"], "d"],
                expected = ["a", "b", "c", "d"]
            },
            "with embedded struct" = {
                input = ["a", {"b"="c"}, "d"],
                expected = ["a", {"b"="c"}, "d"]
            }
        ]
        describe("Original version", () => {
            testCases.each((testDescription, testCase) => {
                it("flattens an array with [#testDescription#]", () => {
                    expect(originalFlatten(argumentCollection=testCase.input)).toBe(testCase.expected)
                })
            })
        })
        describe("Improved version", () => {
            testCases.each((testDescription, testCase) => {
                it("flattens an array with [#testDescription#]", () => {
                    expect(improvedFlatten(argumentCollection=testCase.input)).toBe(testCase.expected)
                })
            })
        })
    })
}

tinyTest.runTests()


public array function originalFlatten() {
	var results = arguments.reduce(
		( reduction, key, value ) => {
			return( reduction.append( value, isArray( value ) ) );
		},
		[]
	);
	return( results );
}

public array function improvedFlatten() {
    return arrayReduce(
        arguments,
        (flattened, value) => flattened.append(value, true),
        []
    )
}
</cfscript>