Generate all possible parameter combinations using cartesian product.

cartesian-combos.js

function cartesian(...args) {
    let r = [], max = args.length - 1;
    let step = (arr, i) => {
        for (let j = 0, l = args[i].length; j < l; j++) {
            let a = arr.slice(0);
            a.push(args[i][j]);
            if (i === max) r.push(a); else step(a, i + 1);
        }
    }
    step([], 0);
    return r;
}

// Example:
let combos = cartesian([1,2,3],[100,200,300], ['A','B','C'], [true, false]);
console.log(JSON.stringify(combos));

// Output:
//'[[1,100,"A",true],[1,100,"A",false],[1,100,"B",true],[1,100,"B",false],[1,100,"C",true],
// [1,100,"C",false],[1,200,"A",true],[1,200,"A",false],[1,200,"B",true],[1,200,"B",false],
// [1,200,"C",true],[1,200,"C",false],[1,300,"A",true],[1,300,"A",false],[1,300,"B",true],
// [1,300,"B",false],[1,300,"C",true],[1,300,"C",false],[2,100,"A",true],[2,100,"A",false],
// [2,100,"B",true],[2,100,"B",false],[2,100,"C",true],[2,100,"C",false],[2,200,"A",true],
// [2,200,"A",false],[2,200,"B",true],[2,200,"B",false],[2,200,"C",true],[2,200,"C",false],
// [2,300,"A",true],[2,300,"A",false],[2,300,"B",true],[2,300,"B",false],[2,300,"C",true],
// [2,300,"C",false],[3,100,"A",true],[3,100,"A",false],[3,100,"B",true],[3,100,"B",false],
// [3,100,"C",true],[3,100,"C",false],[3,200,"A",true],[3,200,"A",false],[3,200,"B",true],
// [3,200,"B",false],[3,200,"C",true],[3,200,"C",false],[3,300,"A",true],[3,300,"A",false],
// [3,300,"B",true],[3,300,"B",false],[3,300,"C",true],[3,300,"C",false]]'