sharepoint_online_get_user_properties

var siteUrl = _spPageContextInfo.siteAbsoluteUrl;
    console.log(siteUrl);
    $.ajax({
        url: siteUrl + "/_api/SP.UserProfiles.PeopleManager/GetPropertiesFor(accountName=@v)?@v='i:0%23.f|membership|kli5@slb.com'",
        method: "GET",
        headers: { "Accept": "application/json; odata=verbose" },
        success: function (data) {
            console.log(data.d.UserProfileProperties);
        },
        error: function(error) {
            console.log(error);
        }
    });

SPServiceHelper.js

/*
 * this js code is a group of helper methods to simplify 
 * reading the returned share point web service values
 *
 * Yufei Liu - feilfly@gmail.com
 * 26th Mar. 2014
 */
var SPServiceHelper = {

    // handles web service response
    Response: {
        toJSON: function(xData, options){
            if(!options){
                options = {
                    mapping: {}, includeAllAttrs: true, removeOws: true
                };
            }
           var json = $(xData.responseXML).SPFilterNode("z:row").SPXmlToJson(options);
           return json;
        }
    },

    // user helper
    User:{
        //extended format: 61032;#Yufei Liu,#DIR\lyufei,#LYufei@slb.com,#LYufei@slb.com,#Yufei Liu
        //simple format:   61032;#Yufei Liu 
        toObject: function(userString){
            var parts = userString.split(";#");
            var userObj = {};

            userObj["id"] = parts[0];

            extend_parts = parts[1].split(",#");

            if(extend_parts.length > 1){
                userObj["name"] = extend_parts[0];
                userObj["login_name"] = extend_parts[1];
                userObj["email"] = extend_parts[2];
                userObj["email"] = extend_parts[3];
                userObj["display_name"] = extend_parts[4];
            }else{
                userObj["name"] = parts[1];
            }
            return userObj;
        }
    }
}