repr.js

var repr = function (o, depth, max) {
    var result, i;
    depth = depth === undefined ? 0 : depth;
    max = max === undefined ? 2 : max;
    if (depth > max) {
        return '<..>';
    }
    switch (typeof o) {
        case 'string': return '"' + o.replace(/"/g, '\\"') + '"';
        case 'function': return o.toString();
        case 'object':
            if (o === null) {
                return null;
            }
            if (Object.prototype.toString.call(o) === '[object Array]') {
                result = [];
                for (i in o) {
                    if (o.hasOwnProperty(i)) {
                        result.push(repr(o[i], depth + 1, max));
                    }
                }
                return '[' + result + ']';
            }
            result = [];
            for (i in o) {
                if (o.hasOwnProperty(i)) {
                    result.push(i + ': ' + repr(o[i], depth + 1, max));
                }
            }
            return '{' + result + '}';
        case 'undefined': return 'undefined';
        default: return o;
    }  
};

var type = typeof exports;
if (type !== 'undefined') {
    exports.repr = repr;
}