Cartesian product of two or more lists: Difference between revisions

Line 857:

<lang groovy>Iterable.metaClass.mixin CartesianCategory

println "\nCore Solution:"

println "[1, 2] × [3, 4] = ${[1, 2] * [3, 4]}"

println "[3, 4] × [1, 2] = ${[3, 4] * [1, 2]}"

println "[1, 2] × [] = ${[1, 2] * []}"

println "[] × [1, 2] = ${[] * [1, 2]}"

println "\nExtra Credit:"

println "[1776, 1789] × [7, 12] × [4, 14, 23] × [0, 1] = ${[1776, 1789] * [7, 12] * [4, 14, 23] * [0, 1]}"

println "[1, 2, 3] × [30] × [500, 100] = ${[1, 2, 3] * [30] * [500, 100]}"

println "[1, 2, 3] × [] × [500, 100] = ${[1, 2, 3] * [] * [500, 100]}"

println "\nNon-Numeric Example:"

println "[John,Paul,George,Ringo] × [Emerson,Lake,Palmer] × [Simon,Garfunkle] = ["

( ["John","Paul","George","Ringo"] * ["Emerson","Lake","Palmer"] * ["Simon","Garfunkle"] ).each { println "\t${it}," }

println "]"</lang>

'''Output:'''

<pre>

⚫

~~<pre>~~[1, 2] × [3, 4] = [[1, 3], [1, 4], [2, 3], [2, 4]]

Core Solution:

⚫

[1, 2] × [3, 4] = [[1, 3], [1, 4], [2, 3], [2, 4]]

[3, 4] × [1, 2] = [[3, 1], [3, 2], [4, 1], [4, 2]]

[1, 2] × [] = []

[] × [1, 2] = []

Extra Credit:

[1776, 1789] × [7, 12] × [4, 14, 23] × [0, 1] = [[1776, 7, 4, 0], [1776, 7, 4, 1], [1776, 7, 14, 0], [1776, 7, 14, 1], [1776, 7, 23, 0], [1776, 7, 23, 1], [1776, 12, 4, 0], [1776, 12, 4, 1], [1776, 12, 14, 0], [1776, 12, 14, 1], [1776, 12, 23, 0], [1776, 12, 23, 1], [1789, 7, 4, 0], [1789, 7, 4, 1], [1789, 7, 14, 0], [1789, 7, 14, 1], [1789, 7, 23, 0], [1789, 7, 23, 1], [1789, 12, 4, 0], [1789, 12, 4, 1], [1789, 12, 14, 0], [1789, 12, 14, 1], [1789, 12, 23, 0], [1789, 12, 23, 1]]

[1, 2, 3] × [30] × [500, 100] = [[1, 30, 500], [1, 30, 100], [2, 30, 500], [2, 30, 100], [3, 30, 500], [3, 30, 100]]

[1, 2, 3] × [] × [500, 100] = []

Non-Numeric Example:

[John,Paul,George,Ringo] × [Emerson,Lake,Palmer] × [Simon,Garfunkle] = [

[John, Emerson, Simon],