var source = {a:1,b:1,c:1,d:1,e:1,f:1,g:1,h:{a:-1,b:1,c:1,d:1,e:1,f:1,g:1}};

//var source = {a:1};

//var CloneFactory = FastClone.factory(source);

​

function clone(value) {

        var type = typeof value;

        switch (type) {

            case 'object':

                // null and undefined

                if (value == null) {

                    return value;

                }

                var result = void 0;

                if (value instanceof Date) {

                    result = new Date();

                    result.setTime(value.getTime());

                    return result;

                }

                else if (value instanceof RegExp) {

                    result = newRegExp(value);

                    return result;

                }

                result = JSON.parse(JSON.stringify(value));

                fixTypes(value, result);

                return result;

            default:

                return value;

        }

    }

    function fixPropertyValue(original, copy, key) {

        var originalValue = original[key];

        var originalType = typeof originalValue;

        switch (originalType) {

            case 'object':

                if (originalValue instanceof Date) {

                    var newValue = new Date();

                    newValue.setTime(originalValue.getTime());

                    copy[key] = newValue;

                }

                else if (originalValue instanceof RegExp) {

                    copy[key] = newRegExp(originalValue);

                }

                else if (originalValue == null) {

                    copy[key] = originalValue;

                }

                else {

                    fixTypes(originalValue, copy[key]);

                }

                break;

            case 'number':

                if (isNaN(originalValue)) {

                    copy[key] = NaN;

                }

                else if (originalValue == Infinity) {

                    copy[key] = Infinity;

                }

                break;

            default:

                break;

        }

    }

    function fixTypes(original, copy) {

        if (original instanceof Array) {

            for (var index = 0; index < original.length; index++) {

                fixPropertyValue(original, copy, index);

            }

        }

        else {

            var keys = Object.getOwnPropertyNames(original);

            keys.forEach(function (key) {

                fixPropertyValue(original, copy, key);

            });

        }

    }

    function newRegExp(value) {

        var regexpText = String(value);

        var slashIndex = regexpText.lastIndexOf('/');

        return new RegExp(regexpText.slice(1, slashIndex), regexpText.slice(slashIndex + 1));

    }