Working with Html.TexBox and DateTime values.

I am working DateTime value today.

@Html.TextBoxFor(m => m.Body.DatePosted, new {@class = "form-control", type = "date", placeholder = ""})

1	@Html.TextBoxFor(m => m.Body.DatePosted, new {@class = "form-control", type = "date", placeholder = ""})

This doesn’t work.. because the

type="date"

1	type="date"

wants the DateTime value like “2018-01-01”, so I need to add

"{0:yyyy-MM-dd}"

1	"{0:yyyy-MM-dd}"

now the whole line look like this

@Html.TextBoxFor(m => m.Body.DatePosted, "{0:yyyy-MM-dd}", new {@class = "form-control", type = "date", placeholder = ""})

1 2	@Html.TextBoxFor(m => m.Body.DatePosted, "{0:yyyy-MM-dd}", new {@class = "form-control", type = "date", placeholder = ""})

now you can get DateTime value and be able to use the calendar editor that type=“date” provide.

Working on Typeahead

Today, I am working on typeahead with Azure Search.

I am reading, https://docs.microsoft.com/en-us/azure/search/search-autocomplete-tutorial

Before you proceed, you need to make sure you have your suggester fieldset. Per index, you can have only one suggester field.

On your page use this javascript

$(function () {
    $("#example1a").autocomplete({
        source: "/home/suggest?highlights=false&fuzzy=false&",
        minLength: 3,
        position: {
            my: "left top",
            at: "left-23 bottom+10"
        },
        classes: {
           "ui-autocomplete":"my-ui-autocomplete"
        }
    });
});

$(function () {

$("#example1a").autocomplete({

source: "/home/suggest?highlights=false&fuzzy=false&",

minLength: 3,

position: {

my: "left top",

at: "left-23 bottom+10"

classes: {

"ui-autocomplete":"my-ui-autocomplete"

}

});

This code above uses the jQuery UI Autocomplete library. (https://jqueryui.com/autocomplete/ , see the API here http://api.jqueryui.com/autocomplete/) you can go to https://code.jquery.com/ and find CDN version to simply copy paste to the page.

Now, let’s look at HomeController.cs (or any controller that you set to be called from the javascript) and related classes to return the suggestions.

/home/suggest?highlihts=false&fuzzy=false needs to return Jason format result.

I actually keep my Azure Search management services in different classes, where I have a method to return a list of suggestions in strings like below.

 public List<string> GetSuggest(bool highlights, bool fuzzy, string term)
 {
    var sp = new SuggestParameters()
    {
       UseFuzzyMatching = fuzzy,
       Top = 5
    };

    if (highlights)
    {
       sp.HighlightPreTag = "<b>";
       sp.HighlightPostTag = "</b>";
    }

    var resp = _searchIndexClient.Documents.Suggest(term, "name", sp);

    return resp.Results.Select(x => x.Text).ToList();
}

public List<string> GetSuggest(bool highlights, bool fuzzy, string term)

{

var sp = new SuggestParameters()

{

UseFuzzyMatching = fuzzy,

Top = 5

};

if (highlights)

{

sp.HighlightPreTag = "<b>";

sp.HighlightPostTag = "</b>";

}

var resp = _searchIndexClient.Documents.Suggest(term, "name", sp);

return resp.Results.Select(x => x.Text).ToList();

}

Then, I have home controller calling this method and return Json as below.

public ActionResult Suggest(bool highlights, bool fuzzy, string term)
{
   return new JsonResult(_searchServiceProvider.GetSuggest(highlights, fuzzy, term));
}

public ActionResult Suggest(bool highlights, bool fuzzy, string term)

{

return new JsonResult(_searchServiceProvider.GetSuggest(highlights, fuzzy, term));

}

This is it, it works beautifully.

Android Architecture Components

Have not done Android development for a while, new things. Nice to catch up.

FirstOrDefault() to Single

original code

var user = db.Users.Where(a => a.Id == id).FirstOrDefault();

1	var user = db.Users.Where(a => a.Id == id).FirstOrDefault();

should be

var user = db.Users.Single(a => a.Id == id);

1	var user = db.Users.Single(a => a.Id == id);

Naming Rules

For readability of your code, please refer to following naming guideline. Continue reading “Naming Rules”

ASP.Net Core 2.0.0 is out, What’s new?

ASP.Net Core 2.0.0 (major release) is out.

OK, so what’s new??

This is my note from the page; https://docs.microsoft.com/en-us/aspnet/core/aspnetcore-2.0

Full list of what’s in 2.0 is at https://github.com/aspnet/Home/releases/tag/2.0.0

Continue reading “ASP.Net Core 2.0.0 is out, What’s new?”

Quick note about Hive and Presto

I am working to build application using Treasuredata. Treasuredata provide Hive or Presto to execute jobs. So here are my mote for those two.

Hive is a program to manage big data, built on top of Hadoop.

Apache Hive is a data warehouse software project built on top of Apache Hadoop for providing data summarization, query, and analysis. Hive gives an SQL-like interface to query data stored in various databases and file systems that integrate with Hadoop. Traditional SQL queries must be implemented in the MapReduce Java API to execute SQL applications and queries over distributed data. Hive provides the necessary SQL abstraction to integrate SQL-like queries (HiveQL) into the underlying Java without the need to implement queries in the low-level Java API. Since most data warehousing applications work with SQL-based querying languages, Hive aids portability of SQL-based applications to Hadoop.

https://en.wikipedia.org/wiki/Apache_Hive

How Hive works

Hive translates SQL queries into multiple stages of MapReduce and it is powerful enough to handle huge numbers of jobs (Although as Arun C Murthy pointed out, modern Hive runs on Tez whose computational model is similar to Spark’s). MapReduce is fault-tolerant since it stores the intermediate results into disks and enables batch-style data processing. Many of our customers issue thousands of Hive queries to our service on a daily basis. A key advantage of Hive over newer SQL-on-Hadoop engines is robustness: Other engines like Cloudera’s Impala and Presto require careful optimizations when two large tables (100M rows and above) are joined. Hive can join tables with billions of rows with ease and should the jobs fail it retries automatically. Furthermore, Hive itself is becoming faster as a result of the Hortonworks Stinger initiative.

How Presto Works

Presto is a SQL engine, built on top of Hadoop.

In some instances simply processing SQL queries is not enough—it is necessary to process queries as quickly as possible so that data scientists and analysts can use Treasure Data for quickly gaining insights from their data collections. For these instances Treasure Data offers the Presto query engine. Presto is an in-memory distributed SQL query engine developed by Facebook that has been open-sourced since November 2013.Presto has been adopted at Treasure Data for its usability and performance.

Presto versus Hive: What You Need to Know

Use Hive for batch – routine jobs. Use Presto to fetch smaller (simpler) data.

Active Directory

Active Directory (AD) is a directory service that Microsoft developed for Windows domain networks. It is included in most Windows Server operating systems as a set of processes and services. Initially, Active Directory was only in charge of centralized domain management. Starting with Windows Server 2008, however, Active Directory became an umbrella title for a broad range of directory-based identity-related services.

https://en.wikipedia.org/wiki/Active_Directory

Active Directory is a database based system that provides authentication, directory, policy, and other services in a Windows environment

LDAP (Lightweight Directory Access Protocol) is an application protocol for querying and modifying items in directory service providers like Active Directory, which supports a form of LDAP.

https://stackoverflow.com/questions/663402/what-are-the-differences-between-ldap-and-active-directory

Active Directory Domain Services is Microsoft’s Directory Server. It provides authentication and authorization mechanisms as well as a framework within which other related services can be deployed (AD Certificate Services, AD Federated Services, etc). It is an LDAP compliant database that contains objects. The most commonly used objects are users, computers, and groups. These objects can be organized into organizational units (OUs) by any number of logical or business needs. Group Policy Objects (GPOs) can then be linked to OUs to centralize the settings for various users or computers across an organization.

When people say “Active Directory” they typically are referring to “Active Directory Domain Services.” It is important to note that there are other Active Directory roles/products such as Certificate Services, Federation Services, Lightweight Directory Services, Rights Management Services, etc. This answer refers specifically to Active Directory Domain Services.

https://serverfault.com/questions/402580/what-is-active-directory-domain-services-and-how-does-it-work

Project Management

My note on: what is project and how should we proceed and close project successfully.

A project is temporary in that it has a defined beginning and end in time, and therefore defined scope and resources.

And a project is unique in that it is not a routine operation, but a specific set of operations designed to accomplish a singular goal. So a project team often includes people who don’t usually work together – sometimes from different organizations and across multiple geographies.

The development of software for an improved business process, the construction of a building or bridge, the relief effort after a natural disaster, the expansion of sales into a new geographic market — all are projects.

And all must be expertly managed to deliver the on-time, on-budget results, learning and integration that organizations need.

From : https://www.pmi.org/about/learn-about-pmi/what-is-project-management

5 steps in project management.

Initiating
Planning
Executing
Monitoring and Controlling
Closing

Initiating

Call on right people with clear goal.

Define

Scope
Time
Quality
Communication method
What needs to be bought, subscribe order

Planning

Write all to do (Gannt Chart), Feature, Story, Tasks
Risk management

Executing

Just do it
Are assignments OK?

Monitoring Controlling

Check:

Is it on schedule?
Is quality OK?
All scopes are staying within scope?
Is initial risk management good enough?

Closing

Check and see if project has 1 come to the end of schedule, 2 complete objectivity.

Working with Pinnacle API – Get Leagues

This is a follow up article of Working with Pinnacle API.

Next operation is to get a list of leagues under a specific sports. Let’s try to continue from the previous view and get list of leagues.

Let’s go to PinnacleAPIHandler and make another class function to call the API operation v2/leagues?sportid={sportid}, and also get new Model ready for request and response of this API.

Continue reading “Working with Pinnacle API – Get Leagues”