How to update ctask once created

[Km Sh]

Hi

How to update description of Change request - CTASKs after it created.
For ex: I have couple of CTASKs got created & need to update the description based on short_description.

Appreciate your inputs. Thanks

[Km Sh]

@Sandeep Rajput 

actually I need to update all the CTASK descriptions, if it matches to short description i.e.; MACD Devices:

for ex: Ctask1, Ctask2, Ctask3...

 var text1 = "MACD Devices: xyz hello";

 var str = current.getValue('short_description');

    if (str.indexOf("text1") > -1) {

        current.setValue('description', text);

       }

Is this correct or missing something..