numberMappingObjKey.js

gistfile1.txt

function a(num) {

    var result = '';

    result += num;

    var run = function() {
        return parseInt(result, 10);
    }

    return {

        0: function(num2) {

            result += '0' + num2;

            return {

                run: run
            }
        },
        1: function(num2) {

            result += '1' + num2;

            return {

                run: run
            }
        },
        2: function(num2) {

            result += '2' + num2;

            return {

                run: run
            }
        },
        3: function(num2) {

            result += '3' + num2;

            return {

                run: run
            }
        },
        4: function(num2) {

            result += '4' + num2;

            return {

                run: run
            }
        },
        5: function(num2) {

            result += '5' + num2;

            return {

                run: run
            }
        },
        6: function(num2) {

            result += '6' + num2;

            return {

                run: run
            }
        },
        7: function(num2) {

            result += '7' + num2;

            return {

                run: run
            }
        },
        8: function(num2) {

            result += '8' + num2;

            return {

                run: run
            }
        },
        9: function(num2) {

            result += '9' + num2;

            return {

                run: run
            }
        }

    }

}

// for test

console.log(a(2)[0](3).run() === 203);
console.log(a(2)[3](3).run() === 233);
console.log(a(5)[8](2).run() === 582);
console.log(a(9)[9](9).run() === 999);