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Underscore.js implementation of Cartesian Product (without any mutable variable).
@see: http://stackoverflow.com/questions/12303989/cartesian-product-of-multiple-arrays-in-javascript
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function cartesianProductOf() { | |
return _.reduce(arguments, function(a, b) { | |
return _.flatten(_.map(a, function(x) { | |
return _.map(b, function(y) { | |
return x.concat([y]); | |
}); | |
}), true); | |
}, [ [] ]); | |
}; | |
cartesianProductOf([1, 2], [3, 4], ['a', 'b'])); // [[1,3,"a"],[1,3,"b"],[1,4,"a"],[1,4,"b"],[2,3,"a"],[2,3,"b"],[2,4,"a"],[2,4,"b"]] |
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