What is difference between using a command $classmethod rather than just invoking them straight away?

For example if i need to call a class and its method i can just use like

do ##class(circle).radius()

rather than using

do $classmethod("circle",radius)

(I suppose both of them doing the same function i am not aware of it)

Please help me understand what is different and is there any specific usage.

Correct me if i have made mistake.

Hi,All,

        I did a small coding for the HTTP request and HTTP response. When i tried to use a server with ping i was able to get a response from the HTTP request. But when i tried the same with HTTP response i am getting a empty value in the response why is that?

Thanks in advance.

Set httprequest=##class(%Net.HttpRequest).%New()
	Set httprequest.Server="www.intersystems.com"
	Do httprequest.Get("/")
	Do httprequest.HttpResponse.OutputToDevice()
	Do httprequest.Get("/cache/")
	Do httprequest.HttpResponse.OutputToDevice()

The above is the code which i found in this link http://docs.intersystems.com/latest/csp/documatic/%25CSP.Documatic.cls?… 
How do the above code works and can i be able to run this?

Thanks in advance.

Is there any Test Driven Development tool for Cache for the web development. If so can any one help me on this.

Thanks in advance.

I am beginner to ensemble and went through the introduction of ensemble in that they have mentioned three process of operations which is business service,business process, business operations is there  anyway to understand these process can anyone help me on this.

Thanks in advance. 

What is the difference between method and class method and why are mentioning one as Method and class method what is the purpose of this?

Hi!

While i am trying to write a data i am getting a error as "<PROPERTY DOES NOT EXIST>zFile+15^User.zKQRest.1 *value,%Collection.ListOfObj" but there are values stored in it. How can i break it write it separately.

In my cache studio i couldn't find the a namespace of iknow so how can i check is my studio version is compatible to to the one i am using now. If i don't have one then can be able to create a new namespace in studio?

Hi!

In the below code for cls with csp i have passed the output to a global but after i give the content in the text box it is getting stored, but when i check the global it is empty.

In iknow they are mentioning that Japanese words cannot be used for iknow in CRC and in CC, If one needs to use iknow for Japanese character how does concepts and relation works for them?

Can we use iknow in the Cache tool means if i don't have deepsee tool to work on like for doing some sample programs. Because i don't have deepsee tool with me?

And is there any open source for downloading deepsee? 

I need to know where i can have good understanding about Deepsee in cache and please provider some example code referring to Deepsee as i am beginner in it. what purpose is it used for ?

Is there any simple code in Cache using FHIR to understand the relationship between them? If so can anyone provide some example.