Serialize form fields recursively into json type object

jquery.serializeObject.js

// jQuery addons
// Serialize form fields recursively into json type object, 
// so for example <input type="text" name="record[type][x]" value="1"> becomes {type: {x: 1}}

var
    rbracket = /\[\]$/,
    rarrayKeys = /\[(.*?)\]/g,
    rarrayKeysPrefix = /^(.*?)\[.*/g,
    rCRLF = /\r?\n/g,
    rsubmitterTypes = /^(?:submit|button|image|reset|file)$/i,
    rsubmittable = /^(?:input|select|textarea|keygen)/i,
    rcheckableType = /^(?:checkbox|radio)$/i;

jQuery.fn.extend( {
    serializeObject: function() {
        var items = this.map( function() {

                // Can add propHook for "elements" to filter or add form elements
                var elements = jQuery.prop( this, "elements" );
                return elements ? jQuery.makeArray( elements ) : this;
            } )
            .filter( function() {
                var type = this.type;

                // Use .is( ":disabled" ) so that fieldset[disabled] works
                return this.name && !jQuery( this ).is( ":disabled" ) &&
                    rsubmittable.test( this.nodeName ) && !rsubmitterTypes.test( type ) &&
                    ( this.checked || !rcheckableType.test( type ) );
            } );

        var keysToArray = function(key, val, match, result) {
            if (match == null) {
                return result;
            }

            var
                this_key = match[1],
                next_match = rarrayKeys.exec(key),
                next_key = (next_match != null ? next_match[1] : null);

            if (next_match == null) {
                if (this_key== '') {
                    result.push(val);
                } else {
                    result[this_key] = val;
                }

                return result;
            }

            // Do this again
            if (typeof result[this_key] == 'undefined') {
                result[this_key] = (next_key == '' ? [] : {});
            }
            keysToArray(key, val, next_match, result[this_key]);

            // Return result
            return result;
        };

        var elementArrayToObject = function(array) {
            var result = {};

            array.each(function(i, elem){
                var val = jQuery( this ).val();

                if (val == null) {
                    return;
                }

                if (jQuery.isArray(val)) {
                    result[elem.name] = elementArrayToObject(val);
                }

                var match = rarrayKeys.exec(elem.name);
                if (match == null) {
                    result[elem.name] = val.replace(rCRLF, "\r\n");
                } else {
                    var prefix = elem.name.replace(rarrayKeysPrefix, '$1');
                    if (typeof result[prefix] == 'undefined') {
                        result[prefix] = {};
                    }

                    keysToArray(elem.name, val.replace(rCRLF, "\r\n"), match, result[prefix]);
                }
            });

            return result;
        };

        return elementArrayToObject(items);
    }
});

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